Yerf-Dog 3209 User manual

FOR MODEL: 3209
For
Replacement
Parts Call:
1-888-926-6554
Read Important Rules for Safe Operation
before Operating Vehicle
NOTICE
YOU MUST DEPRESS THE BRAKE PEDAL
BEFORE THE ENGINE WILL START
This vehicle is sold for OFF-ROAD USE ONLY. Before
operating this vehicle, read all the instructions for safe
assembly and operation as well as the instructions governing
the engine and other portions of the vehicle. Pay close
attention to all caution and warning labels on the Go-Kart.
WARNING
NOTICE
06111 Rev B

STOP
2
1. This vehicle is not licensable. IT IS NOT TO BE OPERATED ON ANY PUBLIC ROAD, STREET,
SIDEWALK or ALLEY. To do so would be a violation of local law. This vehicle may be operated
only on private property and upon areas approved by local law.
2. This vehicle should NEVER be operated indoors. The exhaust from the engine contains carbon
monoxide, which is tasteless, odorless, and poisonous gas.
3. This Go-Kart is not intended nor designed for racing.
4. The operator of this vehicle should always wear a D.O.T approved helmet and other
protective equipment as recommended by state and local laws. The operator should also
wear face shields or goggles, boots, gloves, hearing protection and other appropriate protective
clothing.
5. Unless otherwise specified in this manual, all screws, NUTS, and BOLTS must be kept tight to ensure
that the vehicle is in safe operating condition. The engine must be kept free of all dirt and other
accumulations, paying particular attention to throttle linkage area.
6. Prevailing Torque type lockNUTS lose their locking capability with repeated use and require
replacement. Ensure lockNUTS are functioning properly.
7. The tire pressure should be checked prior to each use. The recommended inFLATion pressure is the
maximum tire pressure which is printed on the tire’s sidewall. Improper tire pressure may cause
instability and may prevent proper braking or steering.
8. Modification of this vehicle or removal of any original equipment or safety decals may render the vehicle
unsafe or illegal. Never remove any chained guard, or belt clutch guard. These covers are
for the riders’ protection.
NOTE: All the items (1-32) below should be read and understood
by the Operator and Parent. Failure to follow these instructions could
endanger personal safety of the operator and any passenger.
For parts or service call 1-888-926-6554 • www.yerf-dog.com
RULES FOR SAFE OPERATION

3
9. The vehicle should never be started without first checking to see that the throttle is in idle position. Do
not start engine without verifying proper function of the throttle.
10. Never attempt to start this vehicle without having the operator sitting in the proper
position to ensure control of the kart.
11. The operator’s ability to operate this off-road vehicle safely is largely dependent upon the operator’s
ability to exercise proper judgment. An operator also must not be too small or too large for controlled
operation. The operator must be at least 16 years of age and have understanding, mental capacity and
physical capability to safely operate this vehicle. This vehicle should only be operated after mature,
supervised instruction and sufficient practice in non-congested areas.
12. This vehicle is designed for one operator and one passenger. A passenger on any vehicle
must be sufficient age, understanding, mental capacity, and physical capability to act to protect
himself/herself, and wear a D.O.T approved helmet at all times. This kart is not recommended
cumulative weights exceeding 250 pounds.
13. The engine should be stopped when the vehicle is not in use.
14. Loose clothing, long hair, or articles worn by any riders must be fully contained, or
covered to prevent them from possibly being caught in rotating parts of the vehicle or
the surrounding environment while riding. Failure to obey could endanger the personal
safety of the Riders.
15. Do not place hands, feet, or any other part of the body or any clothing near the engine,
muffler, wheels, chain, and other rotating parts of the vehicle while riding or running
the engine. Caution must be used in performing required maintenance on or near an operating engine.
Special caution should be taken after the engine has been running, since the engine and other drive
components may be extremely hot.
16. Wet, slippery, rough, or steep terrain is potentially dangerous and may result in injury if proper caution
is not observed. Slow speeds are required to safely operate this vehicle under those conditions. The
Operator must use mature judgement, skill, and experience to choose a speed suitable for the terrain
and riding conditions.
17. The Governor settings for this vehicle’s engine must not be tampered with, altered or
changed. The governor is set by the engine manufacturer and limits the maximum speed of the engine
(and vehicle) and protects the engine from damage. Excessive speeds are potentially dangerous to
the rider and the engine.
18. Each time before using this vehicle, the fuel supply should be checked. The fuel tank should
never be filled while the engine is running or while the engine is hot. Do not fill tank in closed
area such as a garage, while smoking, or in the vicinity of an open flame. Do not overfill the
tank. Always allow at least 1/4 inch of space at the top of the tank for expansion. Never top
off tank. Replace cap tightly to prevent spillage of fuel and potential fire hazard. After filling
tank, move the vehicle at least 15 feet away from spot of filling before starting.
19. If the vehicle should start making unusual noise or vibrating abnormally, the engine should be stopped
and the spark plug wire disconnected. The vehicle should then be checked for damage. Excessive
noise or vibration is generally a warning of loose or worn parts.
20. When making repairs or adjustments to the vehicle which do not involve adjustments to the engine,
the spark plug wire must be disconnected and kept away from the spark plug to prevent accidental
starting. When working on or around or when restarting engine, use extreme caution to avoid contact
with the muffler, cylinder head, or any other potentially hot area on or around the engine.
21. Always perform a Pre-Ride Inspection before starting the engine. See Pre-Ride Inspection in the
manual.
22. The custom brush guard assembled on this vehicle is for deflecting loose vegetation and must not be
removed.
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4
23. When storing the vehicle, it must be kept in a place where gasoline fumes will not reach an open flame
or spark. For long periods of storage, such as for winter, the fuel tank should be drained in the open,
cool area. The engine must be allowed to cool before storage in any enclosure. Read and keep all
printed material supplied with this vehicle. Timely and specific instructions and an Operators Manual
revisions are included in supplements. If any printed material included is unclear, please call 1-888-
926-6554 for assistance.
24. Never operate this vehicle while under the influence of alcohol, drugs, or medication
of any kind. Such operation could be dangerous to you and/or others.
25. Always slow down while turning. High speed turning may cause loss of control, possible injury to the
Operator.
26. Do not race, jump, and perform “stunt” riding or ”spinouts” when operating the Go-Kart. The
Go-Kart is not designed or intended for such operation.
27. This manual provides guidelines for the assembly, maintenance, and operation of this Go-Kart and is
not intended as a service manual.
28. Assembly, maintenance, and/or repair of this Go-Kart should only be performed by persons of sufficient
mechanical skill, experience, and judgment (such as outdoor equipment dealers, motorcycle dealer/shops,
or small engine dealers) so that no unsafe condition or modification is made.
29. Always use extreme caution when starting the engine. Avoid touching the engine, muffler, or drive
components. These areas could cause burns on contact.
30. Operator must always be appropriately supervised at all times while operating this
vehicle.
31. Riding your Go-Kart requires skill acquired through practice over a period of time. Take the time to
learn the basic techniques before attempting to ride the vehicle.
32. Ride only on safe and familiar terrain. Avoid loose gravel and rocks. Be careful on wet surfaces and
allow for extra braking distance.
The Owner Or OperatorAssumesAll The Risks Incident To Or
Arising Out Of The Operation Of This Vehicle.
Failure To Follow And Comply With All Warnings May Cause
Serious Injury Or Death.
Pay close attention to all Caution and Warning labels on the Go-Kart.
ASSUMPTIONS OF RISK
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5
We offer the original purchaser of this product the following warranty:
PART 1
ENGINE
Your engine manufacturer (Howhit) warrants the parts for this engine for 6 months from the
date of purchase. Yerf-Dog Customer Service will facilitate any warranty questions that you
may have. For questions or parts please call 1-888-926-6554.
PART 2
FRAME
The frame and related components are warranted by Flexible Flyer and are applied to any
part found to be defective due to material and/or workmanship when inspected at the Flexible
Flyer factory. Flexible Flyer will at its’ option, repair or replace the defective parts to the original
purchaser at no charge.
The warranty periods are as follows from the date of purchase:
A. Frame for 90 days, Void if:
1. Frame is broken or bent due to abuse (underside scraped abusively).
2. Wheels are bent or broken due to impact.
3. Spindles are bent due to impact.
4. Paint is worn off of rear bumper indicating an extra rider.
5. Axles are bent out of ordinary position either horizontally or vertically.
6. Non-Factory altering of engine or it’s components.
B. Throttle cable, chain, tires, seat, shocks, fasteners and other
components are not warranted because due to normal service they are subject to excessive
wear and abuse.
All Warranties are voided if the vehicle has been altered in any way or is used in racing or
competition, rented, used under abnormal conditions, or subject to abuse, misuse, neglect, or
improper maintenance.
Flexible Flyer is not liable for any damage claim or liability claim, personal or otherwise
resulting from the operation of this vehicle in any way.
F.F. ACQUISITION CORP.
1743 South Horne #100
Mesa, Arizona 85204
FOR REPLACEMENT PARTS PLEASE CALL:
1-888-926-6554
YERF-DOG Go-Karts by Flexible Flyer
LIMITED WARRANTY
The Limited Warranty on this vehicle is in two (2) parts:
For parts or service call 1-888-926-6554 • www.yerf-dog.com

6
ASSEMBLY
Complete the Go-Kart registration and warranty confirmation on the back of this owner’s manual
and mail in within 10 days of purchase. The information is required when ordering parts.
1. Assemble go-kart as indicate on the following pages.
2. BOLTS - Check the screws, NUTS and BOLTS on your vehicle to see that all are tightened
securely. For safe operating conditions, do periodic checks and tighten securely.
3. Fill fuel tank with unleaded gasoline only. Octane should be 85 to 93 or higher.
4. Tire Pressure CHECK AIR PRESSURE IN TIRES!!
It is common industry practice to over inflate the tires. This is done to guarantee an airtight seal.
Prior to riding the Go-Kart for the first time, you may need to reduce the air pressure in the tires
to the specifications stated below:
Rear Tires 10 PSI
Front Tires 12 PSI
Proper tire pressures will increase the life of the tire and enhance the performance of the Go-Kart.
Driving on asphalt or concrete will significantly reduce the life of the tire!!
PRE-RIDE INSPECTION
WARNING - Perform this pre-ride inspection everyday before
riding the vehicle. If not performed, serious damage to the
vehicle and personal injury may result.
1. Engine Oil Level – Add oil if required. Check for leaks. Tighten filler cap securely.
2. Fuel Level – Add fuel if necessary. Do not overfill (no fuel in filler neck). Replace cap tightly.
Check for leaks. Do not mix oil with gas. Only refuel when engine is off and cool.
Note: The fuel cap must be vented. Turn the vent screw on the fuel cap counter
clockwise to vent the tank. Failure to do so will prohibit your unit from running.
3. Brakes – Perform a Brake Test: Sit in the vehicle with the brake actuated by pressing on the
brake pedal. Start the engine with the ignition switch on. Increase the engine RPM gradually
to ensure the brake is effective and that it does not ”leak down”. Do not operate this Go-Kart
unless the brake is working properly. Check brake fluid regularly to ensure that it is clear
colored and that the fluid level is within the minimum and maximum range. This unit should
not crank unless the brake pedal is pressed down.
4. Tires – Verify correct air pressure in tires.
5. Drive Chain and Sprockets – Check condition, tension, lubricate as necessary. Check sprocket
for broken teeth and loose fasteners.
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7
6. Throttle – Check for smooth operation. Assure throttle “snaps” back to idle. Also, check for
frayed cable or damaged cable conduit. If either condition exists replace the cable assembly
before riding.
7. Stop Switch – Perform this stop switch test. While the engine is running, move the steering
column remote stop switch to the “OFF” position. If this does not stop the engine, move the
engine remote switch to the “OFF” position. If the engine is not equipped with an engine
remote switch, pull the spark plug wire. Do not operate this vehicle with a stop switch that
is not functioning properly.
8. All NUTS, BOLTS and Fasteners – Check wheels to assure that all axle NUTS and lug
NUTS are tightened properly. Check and tighten all other fasteners as necessary. Regularly
check set screws on sprockets and drum.
9. Guards – Ensure all protective guards are in place. Never remove any chain guard, or
clutch guard. Each of these covers have a protective purpose, if removed it could endanger
the personal safety of the operator or passenger.
10. Steering System – Ensure that it turns freely.
11. Unit must be on flat level ground.
For parts or service call 1-888-926-6554 • www.yerf-dog.com
OPERATIONAL SAFETY TIPS
TURNING MANEUVERS
The new rider must learn to shift his weight and control the throttle to allow the rear tires to negotiate
the turn. This is the primary technique to be mastered in riding this vehicle. Practice turning at
slow constant speeds. Defer increased speeds until you are confident of your proficiency and are
intimately familiar with the terrain.
Steer in the direction of the turn, and lean your body to the inside of the turn in order to maximize
front tire traction. Use the throttle to maintain posture throughout the turn.
Incorrect turning techniques may cause the front tires to slide straight ahead without affecting the
vehicles direction of travel. If this should occur, come to a stop, then resume the technique outlined
above.
If the front wheels tend to skid in mud, sand, or snow, you may be able to improve control by
releasing the throttle and allowing the vehicle to coast through the turn.
If rear wheel inadvertently skid sideways, correct your slide by steering in the direction of the skid,
if you have room to perform this maneuver safely. Avoid braking or accelerating until you have
control.
To avoid skids while traveling on slippery terrain, the rider must exercise a high degree of caution.
Turning maneuvers on slippery terrain are more hazardous than those performed under full traction
and must be done slowly.

8
PREVENTIVE MAINTENANCE
STORAGE
In the event your vehicle is not to be operated for a period in excess of 30 days and at the end
of riding season prepare for storage as follows:
WARNING- Do not drain fuel while engine is hot. Be sure to move
vehicle outside before draining fuel.
1. Drain fuel tank and remove all fuel remaining in the tank by using a suction device or by soaking
up the fuel with a clean rag or towel. Remove all fuel remaining in the carburetor by allowing
engine to run out of fuel. Do not perform any fuel removal procedure while smoking or near
an open flame. Dispose of any rags or towels properly.
2. Lubricate engine cylinder by removing the spark plug and pouring an ounce of lean lubricating
oil through the spark plug hole into the cylinder. Crank the engine slowly to spread oil and
replace spark plug.
3. Do not save or store gasoline over winter. Using old gasoline that has deteriorated from
storage will cause hard starting and affect engine performance.
4. When the vehicle is removed from storage re-read the owner’s manual, perform any assembly
required, and perform a pre-ride inspection. See Pre-Ride Inspection section of this manual.
GENERAL
Just as your automobile needs professional, mechanical maintenance from time to time, so does
this vehicle. Replacement of the spark plug and ignition points is made necessary by normal use.
Professional air-cooled engine service is easily obtained. Check your phone book yellow pages
under “Engine Gasoline”.
SERVICE INSTRUCTIONS
Kart Lubrication – Every two or three hours of use lubricate the following items with several drops
of oil; steering bearing points, brake rod pivot points, pedal pivot points, steering spindles, and
steering rod ends. Use the same grade of lubricating oil that is used in the engine crankcase.
Front Wheel Replacement – Care must be used when replacing wheels. Do not over tighten
nuts. It is only necessary to tighten the nuts so that the wheel turns freely on the axle with minimum
endplay. If the wheel does not turn freely the nut is too tight.
Rear Wheel Replacement – Loosen the 4 lug nuts in order to remove the tire.
For Engine Service instructions, see the Drive Train Service Section.
For Replacement Parts Please Call:
1-888-926-6554 (U.S.) 1-888-707-1880 (Canada)
For parts or service call 1-888-926-6554 • www.yerf-dog.com

9
For parts or service call 1-888-926-6554 • www.yerf-dog.com
NUTS AND BOLTS
Inspect first week and every month thereafter.
Because frequent operation can cause the kart’s nuts and bolts to loosen, they should be checked
and tightened often. Use the chart below as a torque reference throughout the following assembly
process. TIGHTENING TORQUE CHART
lb. / ft.
1.0 ~ 2.0
2.0 ~ 4.5
6.0 ~ 8.5
13.0 ~ 20.0
29.0 ~ 43.5
50.5 ~ 72.5
79.5 ~ 115.5
123.0 ~ 181.0
144.5 ~ 202.5
kg / m
0.15 ~ 0.3
0.3 ~ 0.6
0.8 ~ 1.2
1.8 ~ 2.8
4.0 ~ 6.0
7.0 ~ 10.0
11.0 ~ 6.0
17.0 ~ 25.0
20.0 ~ 28.0
N / m
1.5 ~ 3
3 ~ 6
8 ~ 12
18 ~ 28
40 ~ 60
70 ~ 100
110 ~ 160
170 ~ 250
200 ~ 280
lb. / ft
0.7 ~ 1.5
1.5 ~ 3.0
3.0 ~ 5.0
7.0 ~ 11.5
16.0 ~ 25.5
25.5 ~ 40.0
36.5 ~ 58.0
58.0 ~ 94.0
94.0 ~ 137.5
kg / m
0.1 ~ 0.2
0.2 ~ 0.4
0.4 ~ 0.7
1.0 ~ 1.6
2.2 ~ 3.5
3.5 ~ 5.5
5.0 ~ 8.0
8.0 ~ 13.0
13.0 ~ 19.0
N / m
1 ~ 2
1 ~ 4
4 ~ 7
10 ~ 16
22 ~ 35
35 ~ 55
50 ~ 80
80 ~ 130
130 ~ 190
Bolt
Diameter
(mm)
4
5
6
8
10
12
14
16
18
8.8 Marked BoltConventional Marked Bolt
HARDWARE IDENTIFICATION
Fuel Tank
Bolt - 5/16" x 3/4"
SEAT BELT
(Female)
Bolt - 3/8" x 1"
(Male) (Shoulder Belt)
Bolt – 5/16" x 2 1/4" Bolt
STEERING WHEEL
Bolt: 1/4” x 1-3/4”
Bolt: 8mm x 1-1/4”
SEAT
(Driver’s Side)
Bolt – 5/16" x 1"
(Passenger’s Side)
Bolt – 5/16" x 1-1/2"
BRUSH GUARD
Bolt - 5/16" x 1 3/4"
Bolt – 5/16" x 2-1/2"
Bolt – 5/16" x 1”

10
SUSPENSION MAINTENANCE
The Suspension System on your Go-Kart is specifically designed and set up for the smoothest possible
ride, while maintaining top performance and kart durability. Your Go-Karts suspension system uses
four shock absorbers, two on the front suspension and two on the rear suspension, to comfortably
tackle rough terrain.
The two front shock absorbers affect the camber or slant of your front tires. You may have noticed
that your new Go-Kart has an extreme outward camber or slant of the front tires as shown in Figure
A.This is normal. They were set this way at the factory for ensuring maximum tread life on the front
tires. There are three important reasons for this outward camber:
1. The weight of the driver and/or passenger is not on the Kart.
The added weight of the driver and/or passenger pushes the front and rear suspension down.
2. The Go-Kart is not in motion.
When the Kart is in motion, the front suspension is forced down slightly.
3. The shock absorbers are new and not “broken in”.
Your new Go-Kart needs at least one hour of use to “break in” the shocks and level out the tires.
After the first 30 minutes of use, the outward camber may be reduced by one half. After 1 hour
of use the tires may have almost no or slight outward camber as shown in Figure B.
When your Go-Kart gets an inward camber on the front tires from shock wear as shown in Figure C
and steering becomes difficult, the shocks will need to be readjusted. Adjust the front suspension to
a slight outward camber as shown in Figure B by increasing the shocks.Adjust the shocks by following
the “Shock Absorber Adjustment “ instructions below. When your shocks cannot be adjusted any
tighter, they must be replaced.
A. EXTREME OUTWARD CAMBER
(NEW SHOCKS, NOT BROKEN IN) C. INWARD CAMBER
(SHOCKS NEED TO BE
ADJUSTED OR REPLACED)
B. SLIGHT OUTWARD CAMBER
(SHOCKS BROKEN IN)
1. Locate the SHOCK ABSORBERS (78) at the front and rear of the Go-Kart.
2. The factory pre-set the SHOCKS for normal operating conditions.
3. Locate the SHOCK ADJUSTMENT HOLE at the base of the spring.
4. Place the end of a narrow screwdriver in the SHOCK ADJUSTMENT HOLE.
5. Turn the SHOCK ADJUSTMENT HOLE counter-clockwise around the SHOCK
to decrease shock absorption.
6. Turn the SHOCK ADJUSTMENT HOLE clockwise around the SHOCK to
increase shock absorption.
7. Experiment with the adjustment until the desired effect is attained.
SHOCK ABSORBER ADJUSTMENT
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11
ASSEMBLY AND INSTALLATION
INSTRUCTIONS
STEERING COLUMN / STEERING WHEEL ASSEMBLY
The steering column comes partially assembled from
the factory.
Adjust angle of steering column to fit seated driver
comfortably before re-tightening allen bolts.
Align steering wheel with front wheel direction and slide
1/4” x 1-3/4” hex bolts through holes in steering wheel.
Insert Assembly through holes of steering shaft.
Attach with 1/4” Nylock NUTS.
Tighten all BOLTS/NUTS (Do not overtighten,
overtightning will crush the plastic housing and result
in an uneven steering wheel position).
Locate Center Cap in the seat belt hardware bag
Place Center Cap over center of steering wheel.
Attach with phillips head screw.
STEERING WHEEL HARDWARE
Description
Bolt: 1/4” x 1-3/4”
Nut: 1/4” Nylock
Screw
BOLT: 8mm x 1-1/4”
Washer: 8mm x 12mm
QTY
3
3
1
4
4
Estimated assembly time: 10 min
All hardware can be found in your hardware bag.
For parts or service call 1-888-926-6554 • www.yerf-dog.com
TOOLS REQUIRED
6 mm Allen wrench
7/16” socket
Rachet (1/4” drive recommended)
7/16” combination wrench

12
SEAT AND SEAT BELT INSTALLATION
SEAT BELT INSTALLATION (FEMALE ENDS)
For ease of installation, it is important to attach the
female seat belts before installing the seats. Attach
both passenger and driver belts to go-kart frame using
(1) 3/8”x 1” bolt and (1) 3/8” nylock nut. Make sure that
the red release button is on top when attaching.
DRIVER SEAT ADJUSTMENT
RAILS
Note: Both driver and passenger
seats are identical.
Attach the seat rails to the driver’s
seat bottom using (4) 5/16”x1”
bolts, adding (2) 5/16” flat washers
between the seat and seat rails.
Note: The passenger seat does
not have adjustable seat rails.
Note: Be careful not to over tighten

TIP The seat rail
adjustment sliders on
rails (76) can be
moved forward or
backward to reveal
square mounting
holes.
To move the slide on
the rail with the
adjustment lever,
press outward on the
lever.
Description
(Driver’s Side)
Bolt – 5/16" x 1"
WASHER – 5/16" FLAT
Nut – 5/16" Nylock
(Passenger’s Side)
Bolt – 5/16" x 1-1/2"
WASHER – 5/16" FLAT
Qty
4
16
4
4
4
SEAT HARDWARE
For parts or service call 1-888-926-6554 • www.yerf-dog.com
Estimated assembly time: 20 min
All hardware can be found in your hardware bag.
Description
(Female)
Bolt - 3/8" x 1"
Nut - 3/8”
(Male) (Shoulder Belt)
Bolt – 5/16" x 2 1/4" Bolt
Nut – 5/16" Nylock
Qty
1
1
2
2
SEAT BELT HARDWARE 9/16” Socket
Ratchet (1/4” drive recommended)
9/16” Combination Wrench
1/2” Socket
Ratchet (1/4” drive recommended)
1/2” Combination Wrench
TOOLS REQUIRED
BACK OF SEAT
FRONT OF SEAT

13
CARGO RACK
Attach rack to Go-kart frame
using (4) 5/16” x 1” bolts
and (4) 5/16” nylock nuts.
BRUSH GUARD ASSEMBLY INSTRUCTIONS
SHOULDER BELT
ATTACHMENT
Attach both driver
and passenger
shoulder belts to the
(2) 5/16”x 2-1/4”
bolts, (2) 5/16”
Nylock nuts and
(2) 5/16” washers.
DRIVER SEAT
Align the threaded studs on the bottom of the seat rail
assembly with the seat bracket holes on the go kart frame,
adding (2) 5/16” flat washers between the seat rail and the
frame. Attach using (4) 5/16” nylock nuts.
Note: leave left rear nut and washer off for seat belt
assembly (see below).
 Before fully tightening nuts, test seat slide mechanism.
If rails are alligned incorrectly, the seat forward / backward
adjustment will not operate. Loosen and adjust rail alignment
to frame and tighten.
PASSENGER SEAT
Align the threaded holes on the bottom of the seat with the
holes on the Go-Kart frame. Attach the seat assembly using
(4) 5/16” flat washers and (4) 5/16" x 1-1/2" bolts
(below the seat rails)
Note: Leave right rear nut off for seat belt assembly
(see below)
DRIVER SIDE SHOULDER BELT
Attach lower end of shoulder belt under the driver’s seat
(below the rail) using the left rear threaded stud on the seat
assembly. Fasten using a 5/16" washer and nut below the belt.
PASSENGER SIDE SHOULDER BELT
Attach lower end of shoulder belt under the passenger’s seat
(below the rail) using the right rear bolt that attaches the
seat. Fasten using 5/16" washer and bolt below the belt.
NOTE: The upper end of the DRIVER AND PASSENGER
SHOULDER BELTS cannot be attached until the Cargo
Rack is installed. Directions for the upper end of the
shoulder belt will follow in the CARGO RACK
ATTACHMENT section.
DRIVER SEAT SHOWN
DRIVER SEAT SHOWN
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1/2” Socket
Ratchet (1/4” drive recommended)
1/2” Combination Wrench
TOOLS REQUIRED
Estimated assembly time: 60 min
All hardware can be found in your

Note: Do not tighten BOLTS or
NUTS until all pieces of the brush
guard are assembled.
Description
Brushguards
Bolt - 5/16" x 1 3/4"
Bolt – 5/16" x 2-1/2"
Bolt – 5/16" x 1”
Nut – 5/16" Nylock
Fuel Tank
Bolt - 5/16" x 3/4"
Lock Washer - 5/16"
QTY
4
2
8
14
2
2
BRUSH GUARD HARDWARE
Lower
end
Upper
end

14
For parts or service call 1-888-926-6554 • www.yerf-dog.com
MAIN BRUSH GUARDS
The main brush guards consist of two front brush
guards (left and right), two rear brush guards (left
and right) and two cross members.
Attach the rear brush guards at the bottom using (2)
5/16” x 1” bolts and (2) 5/16” nylock nuts.
FRONT BRUSH GUARD
CROSS MEMBER ATTACHMENT
Attach using (2) 5/16” x 1-3/4” bolts and (2)
nylock nuts.
Attach front brush guards at front of go-kart using
(2) 5/16” x 1” bolts and (2) 5/16” nylock nuts.
Attach the rear and front brush guards at the top of the
cargo rack as shown in illustration. The rear brush
guards should be under the cargo rack tubing and the
front brush guards should be on top of the cargo rack
tubing.
NOTE:
The front and rear brush guards are
connected at the top of the cargo
rack using the same bolt and nut
(5/16” x 2-1/2” bolt and 5/16” nylock
nut per side).
REAR BRUSH GUARD
CROSS MEMBER ATTACHMENT
Attach using (2) 5/16” x 1-3/4” bolts and (2)
nylock nuts.

FUEL HOSE ATTACHMENT
There are three hoses in close proximity to the
carburetor. To make certain that the correct hose is
connected to the fuel tank, locate the hose that is
already attached to the carburetor (at the bottom,
driver's side of the carburetor). This hose will be in
close proximity to the air filter box. The remaining
hoses are used for vacuum and venting purposes.
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FUEL TANK ATTACHMENT
Attach fuel tank to cargo rack at the passenger side
rear, below the two hanging metal flanges using (2)
5/16" x 3/4" bolts and (2) 5/16" lock washers.
Note: Do not overtighten.
Note: Fuel capacity = 1 gallon
Note: The fuel cap must be vented.
Turn the vent screw on the fuel cap
counter clockwise to vent the tank.
Failure to do so will prohibit your unit
from running.
FUEL TANK AND HOSE ATTACHMENT
Fuel hose and clamp
attached to gas tank.
Two hose clamps can be
found on the fuel hose. One
is used for securing the fuel
hose to the carburetor (please
do not remove this clamp).
The second is used for
securing the fuel hose to the
fuel tank.
Attach fuel hose to fuel tank. Insure that the fuel hose
extends beyond the barbed nipple of the fuel tank
insert and is flush against the side wall.
Position the hose clamp over end of hose.
Note: Check for leaks.
To properly check for leaks - fill tank with fuel, crank
engine and let it run for a few seconds to get fuel into
the fuel line, kill engine, and then check for leaks.

HEADLIGHT ATTACHMENT
Attach headlights to front crossmember using
bolts and nuts provided with headlights.
Note: When spacing headlights on
crossmember, allow enough space for the
center foam wrap (see page 22).
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HEADLIGHT ASSEMBLY INSTRUCTIONS
CONNECTING THE HEADLIGHTS TO THE WIRING HARNESS
The wiring harness contains one RED wire and one BLACK wire (both with female plugs).
Plug male end of RED splitter into the RED wire from the wiring harness.
Plug male end of BLACK splitter into the BLACK wire from the wiring harness.
Each headlight has one RED wire and one BLACK wire (all four wires have male plugs).
Plug the RED wire (one from each headlight) into the female ends of RED splitter.
Plug the BLACK wire (one from each headlight) into the female ends of BLACK splitter.
For parts or service call 1-888-926-6554 • www.yerf-dog.com
Estimated assembly time: 25 min
All headlight hardware can be
found in the headlight bag.
Phillips screwdriver
TOOLS REQUIRED
HEADLIGHT
WIRING
HARNESS
ATTACHMENT
The headlight
wiring harness is
located just behind
the driver’s seat.
Cut wire tie from
harness (Caution:
Be carefull not to
cut the wires) and
route harness as
shown. Use wire
ties provided to
secure harness to
brush gaurd.

17
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BATTERY INSTALLATION
INITIAL SERVICE AND INSTALLATION OF BATTERY:
The following procedure is very dangerous and should be performed with utmost care
and attention. Wear protective eyewear, rubber gloves, and have water available should
electrolyte come in contact with skin or eyes. KEEP ALL CHILDREN AWAY FROM THE
AREA WHILE THIS PROCEDURE IS BEING PERFORMED.
POISON – CAUSES SEVERE BURNS
Contains sulfuric acid.
Avoid contact with skin, eyes, or clothing
TO prevent accidents, rinse empty container with water.
ANTIDOTE:
External – flush with water
Internal – Drink large quantities of water or milk. Follow with milk of magnesia, beaten eggs or
vegetable. Call physician immediately.
Eyes – Flush with water for 15 minutes and get prompt medical attention.
KEEP OUT OF THE REACH OF CHILDREN
WARNING

18
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Preparing the battery:
• Place battery on level surface. Remove sealing tape from top.
(see figure 20)
• Take the electrolyte container out of the plastic bag.
• Place electrolyte container upside down with the sealed silver
mouths of the electrolyte bottles in line with the six filler holes of
the battery. (see figure 21)
• Push the container down strongly enough to break the silver seals.
(see figure 22)
• As electrolyte starts flowing into battery, air bubbles will come up
from the mouths of the plastic electrolyte bottles.
• Leave bottles upside down in battery holes until electrolyte is
completely drained.
• Never leave children unattended around battery.
• If air bubbles cease to float to the top of the electrolyte bottles, tap
lightly on top.
• DO NOT remove container from battery while it is draining.
• Never cut or pierce electrolyte container.
•After all the electrolyte has drained from the bottles into the battery,
pull plastic electrolyte bottles gently out of the battery.
• Discard empty electrolyte bottles in a waste area that is inaccessible
to children and animals.
•After filling let battery stand for at least 30 minutes before charging.
This allows the electrolytes to penetrate plates for optimum
performance and ensures longer battery life.
• After 30 minutes the battery is ready for its initial charge. Place
cap strip loosely over the filling holes as shown in the picture. (see
figure 23). Note: After adding electolyte, the battery holds
FIGURE 20
FIGURE 21
FIGURE 22
FIGURE 23

19
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FIGURE 24
• How to Initially Charge the battery:
1 Connect the red positive (+) cable to the red positive (+) pole of
the battery. (see figure 24)
2 Connect the black negative (-) cable to the black negative (-) pole
of the battery. (see figure 25)
Note: The red positive (+) cable has a larger diameter than the black
negative y cable.
3 Charging rate: Charge battery @ 0.7 Amps for 5 ~ 10 hours.
• After charging is complete, press down firmly with both hands to
seat the caps. (Do not pound or hammer.) The battery is now
sealed. (see figure 26 and 27)
FIGURE 25
FIGURE 26 FIGURE 27
WARNING
NEVER REMOVE THE STRIP OF CAPS
NOR ADD ANY WATER OR ELECTROLYTE.
• Install battery into battery tray making sure that the rubber mat is
in place. The warning label on the battery should be facing the
warning label on the gray tray. (see figure 28)
• Once battery is firmly seated in gray tray with rubber mat under it,
attach the red positive wire to the red positive terminal on the battery.
(see figure 29)
FIGURE 28
FIGURE 29

20
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• Then attach the black negative wire to the black negative terminal
on the battery. (see figure 30)
• Place grey plastic battery cover on top of the battery and thread
wires through the cover cuts – outs. Finally, secure the battery
with the wide black rubber strap using the hooks on both ends.
(see figure 31 and 32)
FIGURE 30
FIGURE 31 FIGURE 32
BATTERY CHARGING
Note: Use a battery charger with 2 amps or less.
Charging Rate: 0.7 A x 5 ~ 10 h
(Charge for 5 – 10 hours @ 0.7 Amps)
• Remove the wide, black battery cover strap and the gray battery cover.
• First remove the black negative y lead from the battery.
• Then remove the red positive ≈lead from the battery.
• Remove the battery from the battery tray.
• Check the battery voltage with a meter.
• If the voltage reading is below 12.3V, recharge the battery.
Battery Service Limit:
Fully charged 12.8 V
Needs charging 12.3 V
• How to charge the battery:
Connect the black negative (-)
cable to the black negative (-)
pole of the battery.
Connect the red positive (+)
cable to the red positive (+) pole
of the battery. Note: Always keep the
battery clean. Apply
dielectric grease around
the battery terminals to
prevent corrosion.