White Brothers Groove 200 User manual
Mountain Racing Products, Inc
580 N. Westgate Dr.
Grand Junction, CO 81505 USA
1.970.241.3518
www.whitebrotherscycling.com
A Division Of
OWNERS MANUAL
TABLE OF CONTENTS
SAFETY.......................................................PAGE 2
INTRODUCTION........................................PAGE 2
FORK INSTALLATION..............................PAGE 3
TUNING.......................................................PAGE 4
MAINTENANCE.....................................PAGE 5,6
EXPLODED VIEWS................................PAGE7,8
IMPORTANT
CONSUMER SAFETY INFORMATION
WARNING: RIDING A BIKE IS DANGEROUS. NOT PROPERLY
MAINTAINING OR INSPECTING YOUR BIKE AND IT’S COMPONENTS IS
EVEN MORE DANGEROUS. IT IS ALSO DANGEROUS TO NOT READ AND
FOLLOW THESE INSTRUCTIONS.
1. NEVER REMOVE STEERER TUBE FROM CROWN. THIS IS APRESSED IN
PART. REMOVING IT WILL RENDER BOTH THE CROWN AND STEERER
TUBE INOPERABLE.* MAKE SURE THE FORK CAPS AND ALL FORK
HARDWARE (pinch bolts, etc.) ARE TIGHT BEFORE EACH RIDE.
2. DO NOT PERFORM ANY MODIFICATIONS OR ADJUSTMENTS THAT
ARE NOT OUTLINED IN THIS MANUAL. SEE THE TUNING SECTION
FOR MORE DETAILS.
3. INSPECT YOUR FORK BEFORE EVERY RIDE. INSPECT THE CROWN,
TUBES, AND AXLE SEAT AREAS FOR ANY SIGNS OF FATIGUE,
BENDING, CRACKING OR OTHER DAMAGE. IF YOU NOTICE ANY TYPE
OF DAMAGE, DO NOT RIDE IT. RETURN IT TO YOUR DEALER OR TO
WHITE BROTHERS FOR A COMPLETE INSPECTION AND NECESSARY
REPAIR.
4. PERFORM ALL RECOMMENDED MAINTENANCEACCORDING TO THE
MAINTENANCE SECTION OF THIS MANUAL. FAILURE TO PERFORM
MAINTENANCE COULD DRASTICALLYREDUCE THE FORK’S LIFE,
PERFORMANCE AND CAUSE YOUR FORK TO BE A SAFETY HAZARD.
5. WHITE BROTHERS RECOMMENDS THAT YOU WEAR PROPER SAFETY
EQUIPMENT EVERY TIME YOU RIDE, INCLUDING AN APPROVED
BICYCLE HELMET. NEVER RIDE AT NIGHT WITHOUT LIGHTS.
6. ALWAYS USE GENUINE WHITE BROTHERS PARTS. USE OF
AFTERMARKET REPLACEMENT PARTS AND UPGRADES VOIDS THE
WARRANTY AND COULD CAUSE STRUCTURAL FAILURE.
7.WHITE BROTHERS FORKS ARE DESIGNED FOR OFF ROAD USE ONLY.
THEY ARE NOT EQUIPPED WITH REFLECTORS FOR ROAD USE. IF YOU
ARE GOING TO USE YOUR FORK ON THE ROAD, HAVE A DEALER OR
MECHANIC INSTALL REFLECTORS THAT MEET THE CONSUMER
PRODUCT SAFETY COMMISSION’S REQUIREMENTS.
*IF SERVICE BECOMES NECESSARY OR REMOVAL OCCURS, PLEASE CALL WHITE BROTHERS
CUSTOMER SERVICE FOR PRODUCT EVALUATION AND DIAGNOSIS.
Thank you for purchasing your new White Brothers fork. Our forks are designed to
help you perform at your absolute peak.
Your new White Brothers fork has oil damping and is air and coil sprung for light
weight performance. The springs and damper are set stock to satisfy a wide range of
rider weights and riding styles. Fine tuning can be easily accomplished by changing
air pressure and external damper settings. See the tuning section for details. Steering
accuracy is improved over conventional MTB forks by utilizing superior materials
and design. Every effort has been made to make White Brothers forks very light and
perform at a level superior to other forks on the market. To ensure peak performance,
proper installation and periodic maintenance is required. When riding on public land,
please respect the rights of others and stay on established paths and trails. By riding
responsibly, you are helping ensure the future of our sport.
FORK INSTALLATION
White Brothers forks feature a 1-1/8” threadless steerer tube. If you have a threaded
type fork on your bicycle, consult your dealer for the appropriate upgrade parts
necessary to convert to a 1-1/8” threadless steerer tube. Check with your frame
manufacturer to ensure your bike is designed for a triple clamp fork. If not, you may
void your warranty.
1. Remove your old fork from the bicycle. Measure the diameter and length of your
old fork’s steerer tube to ensure that the White Brothers steerer tube is the correct
diameter and sufficient length for the installation.
2. Remove the crown race from your old fork.
3. Press the crown race onto your new White Brothers fork.(see Figure #1)
4. Preassemble the headset by sliding the fork steerer tube through the bearings. Then
install the head sets upper race, upper triple clamp, headset spacer (optional), and
stem onto the fork steerer tube. Adjust with optional spacers to your preferred
height. (See Figure #2) WARNING: Refer to the head set owners manual if there
are any questions about the head set installation.
5. Mark the steerer tube at the top of the stem. The steerer tube will now need to be
cut to the correct length. Disassemble and cut 3mm (1/8”) below the mark. Consult
Head Set Race
Lower Triple Clamp
Outer Fork Tube
Frame with
Headset Cups
Headset Upper Race
Upper Triple Clamp
Optional Headset Spacer
Steering Stem
Figure #2
Star Fangled Nut
Steerer Tube
Figure #3
Page 2 Page 3
TABLE OF CONTENTS
SAFETY.......................................................PAGE 2
INTRODUCTION........................................PAGE 2
FORK INSTALLATION..............................PAGE 3
TUNING.......................................................PAGE 4
MAINTENANCE.....................................PAGE 5,6
EXPLODED VIEWS................................PAGE7,8
IMPORTANT
CONSUMER SAFETY INFORMATION
WARNING: RIDING A BIKE IS DANGEROUS. NOT PROPERLY
MAINTAINING OR INSPECTING YOUR BIKE AND IT’S COMPONENTS IS
EVEN MORE DANGEROUS. IT IS ALSO DANGEROUS TO NOT READ AND
FOLLOW THESE INSTRUCTIONS.
1. NEVER REMOVE STEERER TUBE FROM CROWN. THIS IS APRESSED IN
PART. REMOVING IT WILL RENDER BOTH THE CROWN AND STEERER
TUBE INOPERABLE.* MAKE SURE THE FORK CAPS AND ALL FORK
HARDWARE (pinch bolts, etc.) ARE TIGHT BEFORE EACH RIDE.
2. DO NOT PERFORM ANY MODIFICATIONS OR ADJUSTMENTS THAT
ARE NOT OUTLINED IN THIS MANUAL. SEE THE TUNING SECTION
FOR MORE DETAILS.
3. INSPECT YOUR FORK BEFORE EVERY RIDE. INSPECT THE CROWN,
TUBES, AND AXLE SEAT AREAS FOR ANY SIGNS OF FATIGUE,
BENDING, CRACKING OR OTHER DAMAGE. IF YOU NOTICE ANY TYPE
OF DAMAGE, DO NOT RIDE IT. RETURN IT TO YOUR DEALER OR TO
WHITE BROTHERS FOR A COMPLETE INSPECTION AND NECESSARY
REPAIR.
4. PERFORM ALL RECOMMENDED MAINTENANCEACCORDING TO THE
MAINTENANCE SECTION OF THIS MANUAL. FAILURE TO PERFORM
MAINTENANCE COULD DRASTICALLYREDUCE THE FORK’S LIFE,
PERFORMANCE AND CAUSE YOUR FORK TO BE A SAFETY HAZARD.
5. WHITE BROTHERS RECOMMENDS THAT YOU WEAR PROPER SAFETY
EQUIPMENT EVERY TIME YOU RIDE, INCLUDING AN APPROVED
BICYCLE HELMET. NEVER RIDE AT NIGHT WITHOUT LIGHTS.
6. ALWAYS USE GENUINE WHITE BROTHERS PARTS. USE OF
AFTERMARKET REPLACEMENT PARTS AND UPGRADES VOIDS THE
WARRANTY AND COULD CAUSE STRUCTURAL FAILURE.
7.WHITE BROTHERS FORKS ARE DESIGNED FOR OFF ROAD USE ONLY.
THEY ARE NOT EQUIPPED WITH REFLECTORS FOR ROAD USE. IF YOU
ARE GOING TO USE YOUR FORK ON THE ROAD, HAVE A DEALER OR
MECHANIC INSTALL REFLECTORS THAT MEET THE CONSUMER
PRODUCT SAFETY COMMISSION’S REQUIREMENTS.
*IF SERVICE BECOMES NECESSARY OR REMOVAL OCCURS, PLEASE CALL WHITE BROTHERS
CUSTOMER SERVICE FOR PRODUCT EVALUATION AND DIAGNOSIS.
Thank you for purchasing your new White Brothers fork. Our forks are designed to
help you perform at your absolute peak.
Your new White Brothers fork has oil damping and is air and coil sprung for light
weight performance. The springs and damper are set stock to satisfy a wide range of
rider weights and riding styles. Fine tuning can be easily accomplished by changing
air pressure and external damper settings. See the tuning section for details. Steering
accuracy is improved over conventional MTB forks by utilizing superior materials
and design. Every effort has been made to make White Brothers forks very light and
perform at a level superior to other forks on the market. To ensure peak performance,
proper installation and periodic maintenance is required. When riding on public land,
please respect the rights of others and stay on established paths and trails. By riding
responsibly, you are helping ensure the future of our sport.
FORK INSTALLATION
White Brothers forks feature a 1-1/8” threadless steerer tube. If you have a threaded
type fork on your bicycle, consult your dealer for the appropriate upgrade parts
necessary to convert to a 1-1/8” threadless steerer tube. Check with your frame
manufacturer to ensure your bike is designed for a triple clamp fork. If not, you may
void your warranty.
1. Remove your old fork from the bicycle. Measure the diameter and length of your
old fork’s steerer tube to ensure that the White Brothers steerer tube is the correct
diameter and sufficient length for the installation.
2. Remove the crown race from your old fork.
3. Press the crown race onto your new White Brothers fork.(see Figure #1)
4. Preassemble the headset by sliding the fork steerer tube through the bearings. Then
install the head sets upper race, upper triple clamp, headset spacer (optional), and
stem onto the fork steerer tube. Adjust with optional spacers to your preferred
height. (See Figure #2) WARNING: Refer to the head set owners manual if there
are any questions about the head set installation.
5. Mark the steerer tube at the top of the stem. The steerer tube will now need to be
cut to the correct length. Disassemble and cut 3mm (1/8”) below the mark. Consult
Head Set Race
Lower Triple Clamp
Outer Fork Tube
Frame with
Headset Cups
Headset Upper Race
Upper Triple Clamp
Optional Headset Spacer
Steering Stem
Figure #2
Star Fangled Nut
Steerer Tube
Figure #3
Page 2 Page 3
your dealer or mechanic if you don’t have the proper tools to cut the steerer tube.
6. The star fangled nut must now be installed into the steerer tube. If you don’t
have the set tool we recommend dealer installation of this part. (See Figure #3)
7. Clean and grease all headset bearings and races to prepare them for assembly.
Note: Replace the bearings if there is any sign of wear or corrosion.
8. Now loosely assemble the headset, stem and handle bars as done in step four.
(See Figure #2)
9. Install the headset top cap into the star fangled nut. Tighten until there is no play
in the steering. The fork should rotate freely in the head tube. Straighten the stem
in relation to the front tire and tighten the pinch bolts on the stem. Tighten the
pinch bolts on the upper clamp and double check that the lower clamp bolts are
tight. These can easily be over tightened. We recommend tightening to 8 foot
pounds. If there are any questions consult your dealer or mechanic.
10. Slide the wheel in and line up the brake rotor with the brake caliper then line up
the hub with the axle feet. Slide the 20mm axle through the right side foot, hub and
into the left side foot. Tighten the pinch clamps after the axle is properly seated and
tight.
11. Adjust your front brake according to the manufacture’s instructions.
12. Check to see that the brakes are adjusted and properly working. Make sure the
brake line doesn’t interfere with any part of the bike when the fork is compressed
and released.
Warning: When installing the wheel or a new tire, check for minimum
clearance. Measure from the highest point on the tire to the under side of the
crown. There must be 1/8” or 3mm more clearance than the fork’s travel to
ensure adequate clearance in all riding conditions. Any less clearance can cause
the tire to hit the crown resulting in serious injury or death.
The Groove 200 will not work on frames with head tubes longer than 5-1/2”.
To get the most from your White Brothers fork, it is important
that you tune the fork to fit your style of riding and the conditions you ride in.
INITIAL BREAK-IN PERIOD
Your new fork is designed to break-in over a period of 10 hours or more of riding.
As all the parts bed into each other, the stiction (friction) of the fork will diminish
and the fork will absorb the bumps better. After this initial break-in, fine tuning the
air spring and hydraulic damper may be beneficial to achieve the best possible fork
performance for your weight and riding style.
TUNING YOUR SPRINGS
1. There are two ways to adjust your forks spring action. The first is by changing
the air pressure and the second is changing the springs for a completely different
rate. Your White Brothers fork comes equipped with a medium rate spring
adjusted with zero air pressure for minimum pre-load.
2. The medium rate springs that are fitted in your White Brothers forks should
satisfy most rider weights and conditions. If you are a lightweight rider and feel
you are not getting the full travel out of your fork, see “Disassembly of the Spring
Leg”. Remove the o-ring on the double sided spring guide. This will increase
the air volume size and decrease the ramping of the fork. A good way to test the
travel you are using with your fork is to tie a zip tie around fork stanchion and
slide it up to the bottom of the wiper seal. Go and ride a variety of conditions you
normally experience, including some conditions that you feel should use the full
fork travel. After the ride, inspect the position of the zip tie. Measure that position
from the fork wiper seal to the axle clamp. Next remove the fork cap and
compress the fork to full bottom out. If the zip tie moves more than 1/4”, your
spring rate is probably too stiff and a change to less pre-load may improve your
ride. Very heavy riders may note that the zip tie slides down the fork stanchion
quite far even over minor bumps and this could indicate the need for more pre-
load.
3. Pre-load is changed by adding or removing air from spring leg. More air pressure
will have less sag and a firmer feel. Less air pressure will have more sag and a
softer feel. The fork is designed to use zero pressure and should never exceed 40
lbs.
TUNING YOUR DAMPER
1. Rebound damping is adjusted by turning the slotted brass adjuster on the top cap
of the right leg. The adjuster has 8 turns of adjustment. Turn the adjuster clockwise
for slower rebound. To speed up rebound, turn the adjuster counter-clockwise. Start
with a middle setting and fine tune the rebound from there. Proper rebound will
allow the tire to track the ground over consecutive bumps. Rebound that is set too
slow will pack-up (feel harsh over consecutive bumps) while rebound set too fast
will cause the fork to top out harshly. If the fork is topping out and you have the
correct spring for your weight, turn the adjuster one turn at a time until the top-out
stops.
2. Compression damping can be changed two ways: (1) by adjusting the
compression damping screw on the back of the canister on the bottom of the right
fork leg. Threading it in slows compression and threading it out speeds up
compression; and (2) by adding or removing air pressure (or nitrogen)from the
canister at the bottom of the right leg. Pop off the dust cap and adjust between 50
psi min. and 175 psi. max. WARNING: Exceeding the maximum recommended
damper pressure can result in catastrophic rupture of the reservoir canister,
causing serious injury or death. Adding air will increase the compression
damping (slow it down) and removing air will decrease compression damping
(faster compression). Less compression damping will increase the fork dive but
will feel smoother over small bumps. More compression damping will feel stiff
over small bumps but will be more resistant to bottoming. Never run less than 50
psi in the canister.
Your White Brothers fork requires periodic maintenance to ensure peak performance
and long life. Neglecting proper maintenance will reduce the fork’s life. Internal
build up of water and dirt or a lack of lubrication will cause excessive wear and
void the warranty.
BEFORE EVERY RIDE: Visually inspect your fork for bent or broken parts, loss
of oil, abnormal sounds or other indications of possible fork failure. Compress you
fork to verify proper function. Check all other bicycle components to ensure proper
working order.
Page 4 Page5
your dealer or mechanic if you don’t have the proper tools to cut the steerer tube.
6. The star fangled nut must now be installed into the steerer tube. If you don’t
have the set tool we recommend dealer installation of this part. (See Figure #3)
7. Clean and grease all headset bearings and races to prepare them for assembly.
Note: Replace the bearings if there is any sign of wear or corrosion.
8. Now loosely assemble the headset, stem and handle bars as done in step four.
(See Figure #2)
9. Install the headset top cap into the star fangled nut. Tighten until there is no play
in the steering. The fork should rotate freely in the head tube. Straighten the stem
in relation to the front tire and tighten the pinch bolts on the stem. Tighten the
pinch bolts on the upper clamp and double check that the lower clamp bolts are
tight. These can easily be over tightened. We recommend tightening to 8 foot
pounds. If there are any questions consult your dealer or mechanic.
10. Slide the wheel in and line up the brake rotor with the brake caliper then line up
the hub with the axle feet. Slide the 20mm axle through the right side foot, hub and
into the left side foot. Tighten the pinch clamps after the axle is properly seated and
tight.
11. Adjust your front brake according to the manufacture’s instructions.
12. Check to see that the brakes are adjusted and properly working. Make sure the
brake line doesn’t interfere with any part of the bike when the fork is compressed
and released.
Warning: When installing the wheel or a new tire, check for minimum
clearance. Measure from the highest point on the tire to the under side of the
crown. There must be 1/8” or 3mm more clearance than the fork’s travel to
ensure adequate clearance in all riding conditions. Any less clearance can cause
the tire to hit the crown resulting in serious injury or death.
The Groove 200 will not work on frames with head tubes longer than 5-1/2”.
To get the most from your White Brothers fork, it is important
that you tune the fork to fit your style of riding and the conditions you ride in.
INITIAL BREAK-IN PERIOD
Your new fork is designed to break-in over a period of 10 hours or more of riding.
As all the parts bed into each other, the stiction (friction) of the fork will diminish
and the fork will absorb the bumps better. After this initial break-in, fine tuning the
air spring and hydraulic damper may be beneficial to achieve the best possible fork
performance for your weight and riding style.
TUNING YOUR SPRINGS
1. There are two ways to adjust your forks spring action. The first is by changing
the air pressure and the second is changing the springs for a completely different
rate. Your White Brothers fork comes equipped with a medium rate spring
adjusted with zero air pressure for minimum pre-load.
2. The medium rate springs that are fitted in your White Brothers forks should
satisfy most rider weights and conditions. If you are a lightweight rider and feel
you are not getting the full travel out of your fork, see “Disassembly of the Spring
Leg”. Remove the o-ring on the double sided spring guide. This will increase
the air volume size and decrease the ramping of the fork. A good way to test the
travel you are using with your fork is to tie a zip tie around fork stanchion and
slide it up to the bottom of the wiper seal. Go and ride a variety of conditions you
normally experience, including some conditions that you feel should use the full
fork travel. After the ride, inspect the position of the zip tie. Measure that position
from the fork wiper seal to the axle clamp. Next remove the fork cap and
compress the fork to full bottom out. If the zip tie moves more than 1/4”, your
spring rate is probably too stiff and a change to less pre-load may improve your
ride. Very heavy riders may note that the zip tie slides down the fork stanchion
quite far even over minor bumps and this could indicate the need for more pre-
load.
3. Pre-load is changed by adding or removing air from spring leg. More air pressure
will have less sag and a firmer feel. Less air pressure will have more sag and a
softer feel. The fork is designed to use zero pressure and should never exceed 40
lbs.
TUNING YOUR DAMPER
1. Rebound damping is adjusted by turning the slotted brass adjuster on the top cap
of the right leg. The adjuster has 8 turns of adjustment. Turn the adjuster clockwise
for slower rebound. To speed up rebound, turn the adjuster counter-clockwise. Start
with a middle setting and fine tune the rebound from there. Proper rebound will
allow the tire to track the ground over consecutive bumps. Rebound that is set too
slow will pack-up (feel harsh over consecutive bumps) while rebound set too fast
will cause the fork to top out harshly. If the fork is topping out and you have the
correct spring for your weight, turn the adjuster one turn at a time until the top-out
stops.
2. Compression damping can be changed two ways: (1) by adjusting the
compression damping screw on the back of the canister on the bottom of the right
fork leg. Threading it in slows compression and threading it out speeds up
compression; and (2) by adding or removing air pressure (or nitrogen)from the
canister at the bottom of the right leg. Pop off the dust cap and adjust between 50
psi min. and 175 psi. max. WARNING: Exceeding the maximum recommended
damper pressure can result in catastrophic rupture of the reservoir canister,
causing serious injury or death. Adding air will increase the compression
damping (slow it down) and removing air will decrease compression damping
(faster compression). Less compression damping will increase the fork dive but
will feel smoother over small bumps. More compression damping will feel stiff
over small bumps but will be more resistant to bottoming. Never run less than 50
psi in the canister.
Your White Brothers fork requires periodic maintenance to ensure peak performance
and long life. Neglecting proper maintenance will reduce the fork’s life. Internal
build up of water and dirt or a lack of lubrication will cause excessive wear and
void the warranty.
BEFORE EVERY RIDE: Visually inspect your fork for bent or broken parts, loss
of oil, abnormal sounds or other indications of possible fork failure. Compress you
fork to verify proper function. Check all other bicycle components to ensure proper
working order.
Page 4 Page5
AFTER EVERY RIDE: Clean and dry the exterior of your fork. When cleaning the
fork, do not direct the water spray at the seals. Visually inspect your fork for damage.
*EVERY 30 HOURS OF RIDING: Your fork should be disassembled, inspect,
cleaned and re-grease. If the fork appears to be relatively clean, you can go 40 hours
between servicing. If the fork appears excessively dirty you should service it every
20 hours. The three things that will effect the service interval and performance of
your fork are water, mud and dust. How much you use your fork in those conditions
will determine how much service it requires.
*EVERY 100 HOURS OF RIDING: Complete service should include removing
the upper fork legs cleaning and re-greasing all shafts, bushings and seals. Check
damper leg for proper function(see Disassembly of the Damper Leg). NOTE:
Disassembly of the hydraulic damper should be left for the White Brothers factory.
WARNING: Improper servicing of the damper leg can result in hydraulic lock
and catastrophic failure of pressurized parts, causing serious injury or death.
Servicing of the damper must be referred to the White Brothers factory or a
factory -authorized service center.
Tools needed for service
Quantity Part Number Description
1 WB-97-700 Clamp block
1 SH-EDL-04 Suspension Lube
1 9 mm. Open End wrench
1 25 mm. Socket
1 3mm. Allen Wrench
1 25 mm. Open End Wrench
*White Brothers recommends that you consult a tech before performing the
following:
BASIC FORK DISASSEMBLY
Removal of the Leg Assemblies
1. Disconnect the front brake and loosen the pinch clamp bolts at the bottom of each
leg. Un-thread the axle with a 17mm wrench and remove the wheel.
2. Loosen the four M6 upper clamp bolts. Before loosening the lower clamp bolts,
start to loosen the top caps using a 25mm socket. Then loosen the lower clamp
bolts and slide the legs out of the clamps.
Disassembly of the Spring Leg Assembly (Left Hand)
1. Unscrew the top cap from the outer leg. Check for noticeable play between the
stanchion tube and the outer fork tube. If there is play, contact White Brothers or a
qualified dealer for service.
2. Lower the outer leg until the seal touches the drop out. Place in vise with soft
jaws.
3. Remove air from cap. Use a 25mm socket to loosen the rod from the air cap.
Hold the shaft on the flats with a 9mm open end wrench and unscrew the air cap
from the shaft.
4. Remove the inner leg from the outer leg. Remove the stanchion plug using a
25mm wrench or socket.
5. Remove from vise. Remove the fork guard from the dropout. There is a set screw
positioned between two of the fork guard screw holes that should be removed at
this time. Turn the open end of the stantion down to your work bench top Use
compressed air to remove the springs by directing air into the hole to push the
springs and spring separator seal out the top of the leg.
6. Clean and inspect all the parts. Check the DU bushings inside the outer leg
carefully for wear. This is done by looking at the color of the clean bushings. If the
bushings are dark gray, they are in good condition. If they are bronze/gold in areas,
they are worn and can cause fork stanchion damage. Please note that special tools
are required to remove and replace these bushings. This service can be performed
directly through White Brothers or a qualified dealer.
7. Next, inspect the fork stanchion tubes for wear, nicks or scrapes. These will cause
premature wear on the seals and DU bushings. If there is any damage to the
stanchion tubes, have them replaced.
8. Inspect the o-rings for damage. There is a o-ring on each end of the control rod and
on both spring guides. If there’s any question about them sealing, replace the o-
rings.
Disassembly of the Damper Leg Assembly (Right Hand)
NOTE:
Service of the damper is best performed by the WB factory. Contact White Brothers
for the details.
1. Unscrew the top cap from the outer leg. Check for noticeable play between the
stanchion tube and the outer fork tube. If there is play, contact White Brothers or a
qualified dealer for service. Slide the outer leg down to the axle clamp.
2. Unscrew the top cap counterclockwise from the shaft by holding the flats on the
shaft with an open end wrench. Note there is a small spacer under the cap that can
fall out.
3. Remove plastic washer, bumper and spring, then pull the inner leg out of the outer
leg.
BASIC FORK REASSEMBLY
Rebuilding the Outer Legs
1. Throughly clean all the parts.
2. Check the condition of the wiper seals and the inner oil seal for cracks, abrasions
or obvious signs of wear. Note: If the wiper seals are in question, replacement is
always recommended. It helps to keep the dirt out, especially when riding in harsh
conditions.
3. The wiper seals can be removed with a spoon style tire iron or something similar
and can be re-installed using a large socket as a driver to install squarely in to the
leg. Note: Jamming the seals in at an angle can crush the steel casing and the seal
will no longer seal correctly and/or stay in place.
4. Apply grease to the DU bushings down inside the leg. Verify the bushings are in
good working order. Bushings are replaceable but require a number of special
tools to remove and install. Return to White Brothers to have the bushings changed
if required.
Rebuilding the Spring Leg Subassembly
1. Throughly clean all the parts.
2. Check the condition of the o-rings and replace if necessary.
Page 6 Page 7
AFTER EVERY RIDE: Clean and dry the exterior of your fork. When cleaning the
fork, do not direct the water spray at the seals. Visually inspect your fork for damage.
*EVERY 30 HOURS OF RIDING: Your fork should be disassembled, inspect,
cleaned and re-grease. If the fork appears to be relatively clean, you can go 40 hours
between servicing. If the fork appears excessively dirty you should service it every
20 hours. The three things that will effect the service interval and performance of
your fork are water, mud and dust. How much you use your fork in those conditions
will determine how much service it requires.
*EVERY 100 HOURS OF RIDING: Complete service should include removing
the upper fork legs cleaning and re-greasing all shafts, bushings and seals. Check
damper leg for proper function(see Disassembly of the Damper Leg). NOTE:
Disassembly of the hydraulic damper should be left for the White Brothers factory.
WARNING: Improper servicing of the damper leg can result in hydraulic lock
and catastrophic failure of pressurized parts, causing serious injury or death.
Servicing of the damper must be referred to the White Brothers factory or a
factory -authorized service center.
Tools needed for service
Quantity Part Number Description
1 WB-97-700 Clamp block
1 SH-EDL-04 Suspension Lube
1 9 mm. Open End wrench
1 25 mm. Socket
1 3mm. Allen Wrench
1 25 mm. Open End Wrench
*White Brothers recommends that you consult a tech before performing the
following:
BASIC FORK DISASSEMBLY
Removal of the Leg Assemblies
1. Disconnect the front brake and loosen the pinch clamp bolts at the bottom of each
leg. Un-thread the axle with a 17mm wrench and remove the wheel.
2. Loosen the four M6 upper clamp bolts. Before loosening the lower clamp bolts,
start to loosen the top caps using a 25mm socket. Then loosen the lower clamp
bolts and slide the legs out of the clamps.
Disassembly of the Spring Leg Assembly (Left Hand)
1. Unscrew the top cap from the outer leg. Check for noticeable play between the
stanchion tube and the outer fork tube. If there is play, contact White Brothers or a
qualified dealer for service.
2. Lower the outer leg until the seal touches the drop out. Place in vise with soft
jaws.
3. Remove air from cap. Use a 25mm socket to loosen the rod from the air cap.
Hold the shaft on the flats with a 9mm open end wrench and unscrew the air cap
from the shaft.
4. Remove the inner leg from the outer leg. Remove the stanchion plug using a
25mm wrench or socket.
5. Remove from vise. Remove the fork guard from the dropout. There is a set screw
positioned between two of the fork guard screw holes that should be removed at
this time. Turn the open end of the stantion down to your work bench top Use
compressed air to remove the springs by directing air into the hole to push the
springs and spring separator seal out the top of the leg.
6. Clean and inspect all the parts. Check the DU bushings inside the outer leg
carefully for wear. This is done by looking at the color of the clean bushings. If the
bushings are dark gray, they are in good condition. If they are bronze/gold in areas,
they are worn and can cause fork stanchion damage. Please note that special tools
are required to remove and replace these bushings. This service can be performed
directly through White Brothers or a qualified dealer.
7. Next, inspect the fork stanchion tubes for wear, nicks or scrapes. These will cause
premature wear on the seals and DU bushings. If there is any damage to the
stanchion tubes, have them replaced.
8. Inspect the o-rings for damage. There is a o-ring on each end of the control rod and
on both spring guides. If there’s any question about them sealing, replace the o-
rings.
Disassembly of the Damper Leg Assembly (Right Hand)
NOTE:
Service of the damper is best performed by the WB factory. Contact White Brothers
for the details.
1. Unscrew the top cap from the outer leg. Check for noticeable play between the
stanchion tube and the outer fork tube. If there is play, contact White Brothers or a
qualified dealer for service. Slide the outer leg down to the axle clamp.
2. Unscrew the top cap counterclockwise from the shaft by holding the flats on the
shaft with an open end wrench. Note there is a small spacer under the cap that can
fall out.
3. Remove plastic washer, bumper and spring, then pull the inner leg out of the outer
leg.
BASIC FORK REASSEMBLY
Rebuilding the Outer Legs
1. Throughly clean all the parts.
2. Check the condition of the wiper seals and the inner oil seal for cracks, abrasions
or obvious signs of wear. Note: If the wiper seals are in question, replacement is
always recommended. It helps to keep the dirt out, especially when riding in harsh
conditions.
3. The wiper seals can be removed with a spoon style tire iron or something similar
and can be re-installed using a large socket as a driver to install squarely in to the
leg. Note: Jamming the seals in at an angle can crush the steel casing and the seal
will no longer seal correctly and/or stay in place.
4. Apply grease to the DU bushings down inside the leg. Verify the bushings are in
good working order. Bushings are replaceable but require a number of special
tools to remove and install. Return to White Brothers to have the bushings changed
if required.
Rebuilding the Spring Leg Subassembly
1. Throughly clean all the parts.
2. Check the condition of the o-rings and replace if necessary.
Page 6 Page 7
3. Install the parts as shown in the exploded view, using heavy grease on all internal
parts. Thread the assembly into the inner leg. Use a 25 mm socket to get the
stanchion plug started, being carful not to cross thread it into the stanchion.
Rebuilding the Damper Leg Assembly
1. Throughly clean all the parts.
2. Inspect for obvious signs of damage. Pressurize the damper canister to at least 50
psi. Test the damper by pushing the shaft down. It should compress and return in a
controlled manner. Screw the compression adjuster in to insure the damper slows
when adjusted. At the top of the stroke, if the damper shaft does not return to 8”
above the seal head this indicates the need for damper service. Reinstall the
greased spring Reinstall the washer and bumper after the outer leg is installed.
Reinstalling the Outer Legs
1. Apply Slick Honey or other non-lithium based suspension lube to the DU bushings
inside the outer leg. Make sure to lube the lower DU bushing which is deep in the
outer leg.
2. With all parts cleaned and reinstalled with new grease, fit the outer leg over the
stanchion tube and gently rock and slide the legs until the inner leg slides into the
bushings. Slide the outer leg all the way down to the drop out. Check for
noticeable play between the stanchion tubes and the fork lower. If there is play,
contact White Brothers for service.
Reinstalling the Springs and LH Top Cap
1. A 10mm wrench will hold the flats on the shaft as you thread the top cap down
until it stops. Hold the top cap with a 25 mm socket and tighten.
2. Thread the top cap into the outer leg and tighten. Note: A little more than hand
tight is all that is necessary, as the upper clamp will hold the top caps tight.
Reinstalling the RH Top Cap
1. Screw the rebound needle in clockwise until it stops then back it out 3 to 4 turns.
2. Install the small spacer under the top cap if you removed it earlier.
3. On the damper shaft, install the chrome bottom out spring onto the seal head,
spring spacer and then the yellow bumper with heavy grease on all parts. The parts
will be seated the first time the fork bottoms out.
4. Install the top cap onto the damper shaft and tighten. Remove the assembly from
the vise and thread the top cap into the outer leg and tighten. Note: A little more
than hand tight is all that is necessary, as the upper clamp will hold the top caps
tight.
7. Readjust the rebound needle to your preferred position.
The following is an illustration
and parts table which gives
you the exploded view of your
White Brothers fork. The parts
table indicates the part
Page 8 Page 9
22
45
28
29
30
31
32
34
35
36
33
26
27
27
11
23 24
25
21
1
58
58 58
57
56
8
7
50
51
52
54
3
55
54
49
20
10
1
54
2
49
20
48
38
46
43
43
43
41
62
53
53
37
42
44
45
47
9
15
60
18
17
61
14
61
19
16
4
13
19
12
59
58
58
58
57
56
8
65
65
64
58
58
40
5
6
64
63
3. Install the parts as shown in the exploded view, using heavy grease on all internal
parts. Thread the assembly into the inner leg. Use a 25 mm socket to get the
stanchion plug started, being carful not to cross thread it into the stanchion.
Rebuilding the Damper Leg Assembly
1. Throughly clean all the parts.
2. Inspect for obvious signs of damage. Pressurize the damper canister to at least 50
psi. Test the damper by pushing the shaft down. It should compress and return in a
controlled manner. Screw the compression adjuster in to insure the damper slows
when adjusted. At the top of the stroke, if the damper shaft does not return to 8”
above the seal head this indicates the need for damper service. Reinstall the
greased spring Reinstall the washer and bumper after the outer leg is installed.
Reinstalling the Outer Legs
1. Apply Slick Honey or other non-lithium based suspension lube to the DU bushings
inside the outer leg. Make sure to lube the lower DU bushing which is deep in the
outer leg.
2. With all parts cleaned and reinstalled with new grease, fit the outer leg over the
stanchion tube and gently rock and slide the legs until the inner leg slides into the
bushings. Slide the outer leg all the way down to the drop out. Check for
noticeable play between the stanchion tubes and the fork lower. If there is play,
contact White Brothers for service.
Reinstalling the Springs and LH Top Cap
1. A 10mm wrench will hold the flats on the shaft as you thread the top cap down
until it stops. Hold the top cap with a 25 mm socket and tighten.
2. Thread the top cap into the outer leg and tighten. Note: A little more than hand
tight is all that is necessary, as the upper clamp will hold the top caps tight.
Reinstalling the RH Top Cap
1. Screw the rebound needle in clockwise until it stops then back it out 3 to 4 turns.
2. Install the small spacer under the top cap if you removed it earlier.
3. On the damper shaft, install the chrome bottom out spring onto the seal head,
spring spacer and then the yellow bumper with heavy grease on all parts. The parts
will be seated the first time the fork bottoms out.
4. Install the top cap onto the damper shaft and tighten. Remove the assembly from
the vise and thread the top cap into the outer leg and tighten. Note: A little more
than hand tight is all that is necessary, as the upper clamp will hold the top caps
tight.
7. Readjust the rebound needle to your preferred position.
The following is an illustration
and parts table which gives
you the exploded view of your
White Brothers fork. The parts
table indicates the part
Page 8 Page 9
22
45
28
29
30
31
32
34
35
36
33
26
27
27
11
23 24
25
21
1
58
58 58
57
56
8
7
50
51
52
54
3
55
54
49
20
10
1
54
2
49
20
48
38
46
43
43
43
41
62
53
53
37
42
44
45
47
9
15
60
18
17
61
14
61
19
16
4
13
19
12
59
58
58
58
57
56
8
65
65
64
58
58
40
5
6
64
63
Page 10 Page 11
ITEM NO. QTY. PART NO. DESCRIPTION
1 2 100021-100022 DH Outer Leg
2 1 P1159-1 Crown Assm.
3 1 P1157-110 Upper Crown
4 1 100046 Main Spring
5 1 100609 Spring Leg Assm.
6 1 100610 Damper Leg Assm.
7 1 97-3677 Axle
8 2 97-1351 Wiper Seal
9 1 101468 Seal Head
10 1 100600 DH Air Cap
11 1 P2348 DH Damping Cap
12 1 97-3500 Bottom Out Spring
13 1 100612 Spring Seperator Seal
14 1 100613 Control Rod
15 1 100043 Negative Spring VT
16 1 100614 Control Rod End
17 1 97-3342 Bumper Soft
18 1 P3321 Rebound Bumper Spacer
19 2 100262 O-Ring 211
20 2 100054 Schreader Valve Assembly
21 1 P3220 Spring Progression
22 1 100615 Seal Head
23 1 100616 Top Cap Plug
24 1 P3290 Compression Bumper Medium
25 1 97-3914 Spring Spacer 5mm
26 1 P2028 DH Damper Shaft
27 1 P2035 Needle Assm.
28 1 97-1409 Shaft Seal
29 1 P2014 Check Valve Guide
30 1 P2015 Check Valve Spring
31 1 P2004 Check Valve 22x12x0.02
32 1 P2012 Piston
33 1 P3000 Piston Band
34 1 P2006 Low Spd Shim 22x8x0.02
35 1 P2005 Belvil Washer
36 1 P4010 Shim Stack Bolt
37 1 P3026 O-Ring 024
38 1 P1515-1 Reservoir Can
39 1 P2001B Shim
40 1 29-136 Shim
41 1 P2016 Compression Piston
42 1 P3028 O-Ring 021
43 3 29-127 Shim
44 1 P4011 Piston Bolt
45 2 P3021 O-Ring 118
46 1 P2010 Floating Piston Assm.
47 1 100162 O-Ring 2x22.5
48 1 100627 Air Cap Triple Clamp Series
49 2 P4650 Dust Cap
50 1 98-406-1 LH Stone Guard
51 1 98-406-2 RH Stone Guard
52 6 P4005 Screw Nylon Guard
53 4 97-9200 M5x16mm Screw
54 11 97-852 Bolt M6
55 1 97-9300 Star Nut
56 2 P4301 C Clip
57 2 P3060 Oil Seal
58 8 97-986 DU Bushing
59 1 100617 Spacer
60 1 100618 Topout Stop
61 2 100033 O-Ring 010
62 1 P4015 Retaining Pin
63 1 P4004 Compression Adjuster Screw
64 2 97-1418 O-Ring 006
65 2 P4051 Set Screw 6mm x 6
66 1 100531 Axle End Bolt
MAINTENANCE LOG
Date Service Performed
Page 10 Page 11
ITEM NO. QTY. PART NO. DESCRIPTION
1 2 100021-100022 DH Outer Leg
2 1 P1159-1 Crown Assm.
3 1 P1157-110 Upper Crown
4 1 100046 Main Spring
5 1 100609 Spring Leg Assm.
6 1 100610 Damper Leg Assm.
7 1 97-3677 Axle
8 2 97-1351 Wiper Seal
9 1 101468 Seal Head
10 1 100600 DH Air Cap
11 1 P2348 DH Damping Cap
12 1 97-3500 Bottom Out Spring
13 1 100612 Spring Seperator Seal
14 1 100613 Control Rod
15 1 100043 Negative Spring VT
16 1 100614 Control Rod End
17 1 97-3342 Bumper Soft
18 1 P3321 Rebound Bumper Spacer
19 2 100262 O-Ring 211
20 2 100054 Schreader Valve Assembly
21 1 P3220 Spring Progression
22 1 100615 Seal Head
23 1 100616 Top Cap Plug
24 1 P3290 Compression Bumper Medium
25 1 97-3914 Spring Spacer 5mm
26 1 P2028 DH Damper Shaft
27 1 P2035 Needle Assm.
28 1 97-1409 Shaft Seal
29 1 P2014 Check Valve Guide
30 1 P2015 Check Valve Spring
31 1 P2004 Check Valve 22x12x0.02
32 1 P2012 Piston
33 1 P3000 Piston Band
34 1 P2006 Low Spd Shim 22x8x0.02
35 1 P2005 Belvil Washer
36 1 P4010 Shim Stack Bolt
37 1 P3026 O-Ring 024
38 1 P1515-1 Reservoir Can
39 1 P2001B Shim
40 1 29-136 Shim
41 1 P2016 Compression Piston
42 1 P3028 O-Ring 021
43 3 29-127 Shim
44 1 P4011 Piston Bolt
45 2 P3021 O-Ring 118
46 1 P2010 Floating Piston Assm.
47 1 100162 O-Ring 2x22.5
48 1 100627 Air Cap Triple Clamp Series
49 2 P4650 Dust Cap
50 1 98-406-1 LH Stone Guard
51 1 98-406-2 RH Stone Guard
52 6 P4005 Screw Nylon Guard
53 4 97-9200 M5x16mm Screw
54 11 97-852 Bolt M6
55 1 97-9300 Star Nut
56 2 P4301 C Clip
57 2 P3060 Oil Seal
58 8 97-986 DU Bushing
59 1 100617 Spacer
60 1 100618 Topout Stop
61 2 100033 O-Ring 010
62 1 P4015 Retaining Pin
63 1 P4004 Compression Adjuster Screw
64 2 97-1418 O-Ring 006
65 2 P4051 Set Screw 6mm x 6
66 1 100531 Axle End Bolt
MAINTENANCE LOG
Date Service Performed
MAINTENANCE LOG
Date Service Performed
Page 12
MAINTENANCE LOG
Date Service Performed
Page 13
MAINTENANCE LOG
Date Service Performed
Page 12
MAINTENANCE LOG
Date Service Performed
Page 13
WARRANTY CLAIMS
White Brothers forks are the highest quality and as such are warranted to be free from
defects in materials and workmanship for a period of one year from the date of
purchase for the original purchaser. On receipt of the fork, if it is found to be
defective, White Brothers will determine replacement or repair of the fork. This
warranty is the sole and exclusive remedy. White Brothers shall not be liable for any
indirect, special or consequential damages. Warranty does not apply to any product
that has been installed improperly or adjusted using methods not outlined in this
manual. Warranty also does not cover forks that have been misused, or forks that
have missing/altered serial numbers (located on the back of the right fork stanchion).
The fork is not warrantied against damage in the appearance of the fork or for
modifications not outlined in this manual. This warranty does not cover breakage,
bending, or damage that may result from crashes, falls or abuse. Normal wear (i.e.
seals, bushings, sliders finish, etc) and tear and damage caused by lack of proper
maintenance is not included. *The warranty registration card must be filled out
and returned within 30 days of purchase to activate and validate this warranty.
A copy of the proof of purchase must be included with all warranties. Customers in
the US please contact your White Brothers or your dealer for a Return Authorization
Number (RA#) before returning the forks. All forks returned for inspection must be
sent freight paid to:
White Brothers Cycling
580 N. Westgate Dr.
Grand Junction, CO 81505
USA
MAINTENANCE LOG
Date Service Performed
Page 14 Page 15
WARRANTY CLAIMS
White Brothers forks are the highest quality and as such are warranted to be free from
defects in materials and workmanship for a period of one year from the date of
purchase for the original purchaser. On receipt of the fork, if it is found to be
defective, White Brothers will determine replacement or repair of the fork. This
warranty is the sole and exclusive remedy. White Brothers shall not be liable for any
indirect, special or consequential damages. Warranty does not apply to any product
that has been installed improperly or adjusted using methods not outlined in this
manual. Warranty also does not cover forks that have been misused, or forks that
have missing/altered serial numbers (located on the back of the right fork stanchion).
The fork is not warrantied against damage in the appearance of the fork or for
modifications not outlined in this manual. This warranty does not cover breakage,
bending, or damage that may result from crashes, falls or abuse. Normal wear (i.e.
seals, bushings, sliders finish, etc) and tear and damage caused by lack of proper
maintenance is not included. *The warranty registration card must be filled out
and returned within 30 days of purchase to activate and validate this warranty.
A copy of the proof of purchase must be included with all warranties. Customers in
the US please contact your White Brothers or your dealer for a Return Authorization
Number (RA#) before returning the forks. All forks returned for inspection must be
sent freight paid to:
White Brothers Cycling
580 N. Westgate Dr.
Grand Junction, CO 81505
USA
MAINTENANCE LOG
Date Service Performed
Page 14 Page 15
Mountain Racing Products, Inc
580 N. Westgate Dr.
Grand Junction, CO 81505 USA
1.970.241.3518
www.whitebrotherscycling.com
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