Xray X12 User manual

INSTRUCTION MANUAL
FOR X12'20 EU & US EDITION

2
BEFORE YOU START
This is a high-competition, high-quality RC car intended for persons aged 16
years and older with previous experience building and operating RC model racing
cars. This is not a toy; it is a precision racing model. This model racing car is not
intended for use by beginners, inexperienced customers, or by children without
direct supervision of a responsible, knowledgeable adult. If you do not fulfill these
requirements, please return the kit in unused and unassembled form back to the
shop where you have purchased it.
Before building and operating your XRAY, YOU MUST read through all of the
operating instructions and instruction manual and fully understand them to get
the maximum enjoyment and prevent unnecessary damage.
Read carefully and fully understand the instructions before beginning assembly.
Make sure you review this entire manual, download and use set-up book from the
web, and examine all details carefully. If for some reason you decide this is not what
you wanted or expected, do not continue any further. Your hobby dealer can not
accept your kit for return or exchange after it has been partially or fully assembled.
Contents of the box may differ from pictures. In line with our policy of continuous
product development, the exact specifications of the kit may vary without prior notice.
SAFETY PRECAUTIONS
Contains:
LEAD (CAS 7439-92-1) ANTIMONY (CAS 7440-36-0)
WARNING: This product contains a chemical known to the state of California to
cause cancer and birth defects or other reproductive harm.
CAUTION: CANCER HAZARD
Contains lead, a listed carcinogen. Lead is harmful if ingested. Wash thoroughly
after using. DO NOT use product while eating, drinking or using tobacco products.
May cause chronic effects to gastrointestinal tract, CNS, kidneys, and blood. MAY
CAUSE BIRTH DEFECTS.
When building, using and/or operating this model always wear protective glasses
and gloves.
Take appropriate safety precautions prior to operating this model. You are
responsible for this model‘s assembly and safe operation! Please read the
instruction manual before building and operating this model and follow all safety
precautions. Always keep the instruction manual at hand for quick reference, even
after completing the assembly. Use only genuine and original authentic XRAY
parts for maximum performance. Using any third party parts on this model will
void guaranty immediately.
Improper operation may cause personal and/or property damage. XRAY and
its distributors have no control over damage resulting from shipping, improper
construction, or improper usage. XRAY assumes and accepts no responsibility for
personal and/or property damages resulting from the use of improper building
materials, equipment and operations. By purchasing any item produced by XRAY,
the buyer expressly warrants that he/she is in compliance with all applicable
federal, state and local laws and regulation regarding the purchase, ownership
and use of the item. The buyer expressly agrees to indemnify and hold harmless
XRAY for all claims resulting directly or indirectly from the purchase, ownership or
use of the product. By the act of assembling or operating this product, the user
accepts all resulting liability. If the buyer is not prepared to accept this liability,
then he/she should return this kit in new, unassembled, and unused condition to
the place of purchase.
IMPORTANT NOTES – GENERAL
• This product is not suitable for children under 16 years of age without the direct
supervision of a responsible and knowledgeable adult.
• Carefully read all manufacturers warnings and cautions for any parts used in
the construction and use of your model.
• Assemble this kit only in places away from the reach of very small children.
• First-time builders and users should seek advice from people who have building
experience in order to assemble the model correctly and to allow the model to
reach its performance potential.
• Exercise care when using tools and sharp instruments.
• Take care when building, as some parts may have sharp edges.
• Keep small parts out of reach of small children. Children must not be allowed
to put any parts in their mouth, or pull vinyl bag over their head.
• Read and follow instructions supplied with paints and/or cement, if used (not
included in kit).
• Immediately after using your model, do NOT touch equipment on the
model such as the motor and speed controller, because they generate high
temperatures. You may seriously burn yourself seriously touching them.
• Follow the operating instructions for the radio equipment at all times.
• Do not put fingers or any objects inside rotating and moving parts, as this
may cause damage or serious injury as your finger, hair, clothes, etc. may get
caught.
• Be sure that your operating frequency is clear before turning on or running
your model, and never share the same frequency with somebody else at the
same time. Ensure that others are aware of the operating frequency you are
using and when you are using it.
• Use a transmitter designed for ground use with RC cars. Make sure that no one
else is using the same frequency as yours in your operating area. Using the
same frequency at the same time, whether it is driving, flying or sailing, can
cause loss of control of the RC model, resulting in a serious accident.
• Always turn on your transmitter before you turn on the receiver in the car.
Always turn off the receiver before turning your transmitter off.
• Keep the wheels of the model off the ground when checking the operation of
the radio equipment.
• Disconnect the battery pack before storing your model.
• When learning to operate your model, go to an area that has no obstacles that
can damage your model if your model suffers a collision.
• Remove any sand, mud, dirt, grass or water before putting your model away.
• If the model behaves strangely, immediately stop the model, check and clear
the problem.
• To prevent any serious personal injury and/or damage to property, be
responsible when operating all remote controlled models.
• The model car is not intended for use on public places and roads or areas where
its operation can conflict with or disrupt pedestrian or vehicular traffic.
• Because the model car is controlled by radio, it is subject to radio interference
from many sources that are beyond your control. Since radio interference can
cause momentary loss of control, always allow a safety margin in all directions
around the model in order to prevent collisions.
• Do not use your model:
- Near real cars, animals, or people that are unaware that an RC car is being
driven.
- In places where children and people gather
- In residential districts and parks
- In limited indoor spaces
- In wet conditions
- In the street
- In areas where loud noises can disturb others, such as hospitals and
residential areas.
- At night or anytime your line of sight to the model may be obstructed or
impaired in any way.
To prevent any serious personal injury and/or damage to property, please be
responsible when operating all remote controlled models.
CUSTOMER SUPPORT
XRAY Europe
K Vystavisku 6992
91101 Trenčín
Slovakia, EUROPE
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
We have made every effort to make these instructions as easy to understand as possible.
However, if you have any difficulties, problems, or questions, please do not hesitate to
contact the XRAY support team at [e-mail]. Also, please visit our Web site at
www.teamxray.com to find the latest updates, set-up information, option parts, and many
other goodies. We pride ourselves on taking excellent care of our customers.
You can join thousands of XRAY fans and enthusiasts in our online community at:
www.teamxray.com
XRAY USA
RC America, 2030 Century Center Blvd #15
Irving, TX 75062
USA
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
FAILURE TO FOLLOW THESE INSTRUCTIONS WILL BE CONSIDERED AS ABUSE AND/OR NEGLECT.

3
IMPORTANT NOTES – ELECTRICAL
• Insulate any exposed electrical wiring (using heat shrink tubing or electrical tape)
to prevent dangerous short circuits. Take maximum care in wiring, connecting
and insulating cables. Make sure cables are always connected securely. Check
connectors for if they become loose. And if so, reconnect them securely. Never
use RC models with damaged wires. A damaged wire is extremely dangerous,
and can cause short-circuits resulting in fire. Please have wires repaired at your
local hobby shop.
• Low battery power will result in loss of control. Loss of control can occur due to
a weak battery in either the transmitter or the receiver. Weak running battery
may also result in an out of control car if your car‘s receiver power is supplied
by the running battery. Stop operation immediately if the car starts to slow
down.
• When not using RC model, always disconnect and remove battery.
• Do not disassemble battery or cut battery cables. If the running battery short-
circuits, approximately 300W of electricity can be discharged, leading to fire or
burns. Never disassemble battery or cut battery cables.
• Use a recommended charger for the receiver and transmitter batteries and
follow the instructions correctly. Over-charging, incorrect charging, or using
inferior chargers can cause the batteries to become dangerously hot. Recharge
battery when necessary. Continual recharging may damage battery and, in the
worst case, could build up heat leading to fire. If battery becomes extremely hot
during recharging, please ask your local hobby shop for check and/or repair
and/or replacement.
• Regularly check the charger for potential hazards such as damage to the
cable, plug, casing or other defects. Ensure that any damage is rectified
before using the charger again. Modifying the charger may cause short-circuit
or overcharging leading to a serious accident. Therefore do not modify the
charger.
• Always unplug charger when recharging is finished.
• Do not recharge battery while battery is still warm. After use, battery retains
heat. Wait until it cools down before charging.
• Do not allow any metal part to short circuit the receiver batteries or other
electrical/electronic device on the model.
• Immediately stop running if your RC model gets wet as may cause short circuit.
• Please dispose of batteries responsibly. Never put batteries into fire.
WARRANTY
XRAY guarantees this model kit to be free from defects in both material and
workmanship within 30 days of purchase. The total monetary value under warranty
will in no case exceed the cost of the original kit purchased. This warranty does
not cover any components damaged by use or modification or as a result of wear.
Part or parts missing from this kit must be reported within 30 days of purchase. No
part or parts will be sent under warranty without proof of purchase. Should you
find a defective or missing part, contact the local distributor. Service and customer
support will be provided through local hobby store where you have purchased the
kit, therefore make sure to purchase any XRAY products at your local hobby store.
This model racing car is considered to be a high-performance racing vehicle. As
such this vehicle will be used in an extreme range of conditions and situations,
all which may cause premature wear or failure of any component. XRAY has no
control over usage of vehicles once they leave the dealer, therefore XRAY can only
offer warranty against all manufacturer‘s defects in materials, workmanship, and
assembly at point of sale and before use. No warranties are expressed or implied
that cover damage caused by what is considered normal use, or cover or imply
how long any model cars‘ components or electronic components will last before
requiring replacement.
Due to the high performance level of this model car you will need to periodically
maintain and replace consumable components. Any and all warranty coverage
will not cover replacement of any part or component damaged by neglect, abuse,
or improper or unreasonable use. This includes but is not limited to damage
from crashing, chemical and/or water damage, excessive moisture, improper
or no maintenance, or user modifications which compromise the integrity of
components. Warranty will not cover components that are considered consumable
on RC vehicles. XRAY does not pay nor refund shipping on any component sent
to XRAY or its distributors for warranty. XRAY reserves the right to make the final
determination of the warranty status of any component or part.
Limitations of Liability
XRAY makes no other warranties expressed or implied. XRAY shall not be liable
for any loss, injury or damages, whether direct, indirect, special, incidental, or
consequential, arising from the use, misuse, or abuse of this product and/or any
product or accessory required to operate this product. In no case shall XRAY‘s
liability excess the monetary value of this product.
Take adequate safety precautions prior to operating this model. You
are responsible for this model’s assembly and safe operation.
Disregard of the any of the above cautions may lead to accidents,
personal injury, or property damage. XRAY MODEL RACING CARS
assumes no responsibility for any injury, damage, or misuse of this
product during assembly or operation, nor any addictions that may
arise from the use of this product.
All rights reserved.
QUALITY CERTIFICATE
XRAY MODEL RACING CARS uses only the highest quality materials, the best
compounds for molded parts and the most sophisticated manufacturing processes
of TQM (Total Quality Management). We guarantee that all parts of a newly-
purchased kit are manufactured with the highest regard to quality. However, due
to the many factors inherent in model racecar competition, we cannot guarantee
any parts once you start racing the car. Products which have been worn out,
abused, neglected or improperly operated will not be covered under warranty.
We wish you enjoyment of this high-quality and high-performance RC car and
wish you best success on the track!
In line with our policy of continuous product development, the exact specifications of the kit may
vary. In the unlikely event of any problems with your new kit, you should contact the model shop
where you purchased it, quoting the part number.
We do reserve all rights to change any specification without prior notice. All rights reserved.
R/C & BUILDING TIPS
• Make sure all fasteners are properly tightened. Check them periodically.
• Make sure that chassis screws do not protrude from the chassis.
• For the best performance, it is very important that great care is taken to ensure
the free movement of all parts.
• Clean all ball-bearings so they move very easily and freely.
• Tap or pre-thread the plastic parts when threading screws.
• Self-tapping screws cut threads into the parts when being tightened. Do not use
excessive force when tightening the self-tapping screws because you may strip
out the thread in the plastic. We recommended you stop tightening a screw
when you feel some resistance.
• Ask your local hobby shop for any advice.
Please support your local hobby shop. We at XRAY Model Racing Cars support
all local hobby dealers. Therefore we ask you, if at all possible, to purchase
XRAY products at your hobby dealer and give them your support like we do. If
you have difficulty finding XRAY products, please check out www.teamxray.com
to get advice, or contact us via email at [e-mail], or contact the XRAY
distributor in your country.

4
NOT INCLUDED
XRAY offers wide range of optional tuning parts which
are listed in a table like this. Please refer to the
exploded view of each main section to verify which
parts are included in the kit; other parts are available
as optional parts, and must be purchased separately.
SYMBOLS USED
L=R
2x
CA
OIL
Part bags used Assemble left and right
sides the same way
Assemble in the specified
order
Pay attention here Assemble as many times
as specified (here twice)
Apply CA glue
TOOLS REQUIRED
EQUIPMENT REQUIRED
EQUIPMENT INCLUDED
Apply oil
Side Cutters
(HUDY #189010)
Reamer
(HUDY #107600)
or
(HUDY #107601)
Combination Pliers
(HUDY #189020)
HUDY TOOLS: Allen: 1.5mm, 2.0mm, 2.5mm
Socket: 5.5mm, Arm Reamer 3.0mm
05
Assembly view
Cut
Apply grease
3.0 mm
2.0 mm
2.5 mm
1.5 mm
5.5 mm
Diff. Grease
(HUDY #106211)
Follow Set-Up Book
Scissors
(HUDY #188990)
SAMPLE OF
OPTIONAL PARTS
#37XXXX OPTION 1
#37XXXX OPTION 2
#37XXXX OPTION 3
Pinion Gear and Setscrew
Transmitter Steering ServoReceiver Bearing Oil
(HUDY #106230) Speed Controller
Electric Motor &
Lexan™ Paint Battery Charger Tires
LiPo BatteryBody Shell Fibre Tape
(HUDY #107870)
Double-sided Tape
(HUDY #107875)
To ensure that you always have access to the most up-to-date version of the XRAY Set-up Book,
XRAY will now be offering only the digital online version at our website at www.teamxray.com. By
offering this online version instead of including a hardcopy printed version in kits, you will always
be assured of having the most current updated version. The Set-up Book features the T-bar
version of the XII, however the majority of all set-up adjustments and theory are the same. We
strongly recommend that you read and understand the Set-up Book before operating your car.
HUDY Premium Silicone Oil
700cSt (HUDY #106370 50ml)
3000cSt (HUDY #106430 50ml)
Turnbuckle 4mm
(HUDY #181040)
Turnbuckle 3mm
(HUDY #181030)
Tighten screw gentlyEnsure smooth
non-binding movement
Detail view
DETAIL
Pocket Hobby Knife
(HUDY #188981)

5
GRAPHITE PART PREPARATION
To protect and seal edges of graphite parts, sand edges smooth and then apply CA glue.
CA
PREPARE ALL GRAPHITE PARTS
Apply CA glue to all adges
of the graphite parts.
Fine sandpaper
Use fine sandpaper to sand smooth
the edges of all graphite parts.

6
1. FRONT SUSPENSION
ALU ECCENTRIC BUSHINGS
#372316-O 0mm INCLUDED
#372317-O 0.5mm OPTION
#372318-O 1.0mm OPTION
FRONT COIL SPRINGS - SOFT
#372176 C=1.5 GOLD OPTION
#372177 C=2.0 SILVER OPTION
#372178 C=2.5 BLACK OPTION
#372179 C=3.0 GREY OPTION
FRONT COIL SPRINGS
#372180 C=3.5 GOLD INCLUDED
#372181 C=4.0 SILVER OPTION
#372182 C=5.0 BLACK OPTION
#372183 C=5.5 GREY OPTION
COMPOSITE SUSPENSION ARMS
#372112 RIGHT HARD OPTION
#372113 RIGHT GRAPHITE INCLUDED
#372122 LEFT HARD OPTION
#372123 LEFT GRAPHITE INCLUDED
UPPER ARM MOUNTS
#372010 RIGHT MEDIUM OPTION
#372011 RIGHT HARD OPTION
#372012 RIGHT GRAPHITE INCLUDED
#372020 LEFT MEDIUM OPTION
#372021 LEFT HARD OPTION
#372022 LEFT GRAPHITE INCLUDED
372180
372022
372620
371113
372315
902312
901304
960031
372290
372316-O
303121-O
373120-O
377220
372123
372292
372293
372294 373241
BAG
903312
960031
371211
903310
902305
372088
903308
902310
965019
372290
372280
372131-G
373240
965019
372150
372650
964032 372221
303123-O
303122-O
375220
303121-O ALU SHIM 3x6x0.5MM - ORANGE (10)
303122-O ALU SHIM 3x6x1.0MM - ORANGE (10)
303123-O ALU SHIM 3x6x2.0MM - ORANGE (10)
371113 X12‘20 GRAPHITE CHASSIS 2.5MM
371211 GRAPHITE BUMPER LOWER HOLDER 2.5MM
372012 COMPOSITE FRONT UPPER ARM MOUNT - RIGHT - GRAPHITE
372022 COMPOSITE FRONT UPPER ARM MOUNT - LEFT - GRAPHITE
372088 X12’20 FRONT BRACE - GRAPHITE 2.0MM
372113 COMPOSITE SUSPENSION ARM FRONT LOWER - RIGHT - GRAPHITE
372123 COMPOSITE SUSPENSION ARM FRONT LOWER - LEFT - GRAPHITE
372131-G COMPOSITE FRONT UPPER SUSPENSION ARM - GRAPHITE
372150 COMPOSITE FRONT UPPER BALL JOINT (2)
372180 FRONT COIL SPRING 3.6x6x0.5MM; C=3.5 - GOLD (2)
372211 COMPOSITE STEERING BLOCK - RIGHT - HARD - V3
372221 COMPOSITE STEERING BLOCK - LEFT - HARD - V3
372280 KING PIN (2)
372290 ALU SHIM 3.2x4.8x0.5 (4)
372292 STEEL SHIM 0.2MM - SILVER (2)
372293 STEEL SHIM 0.4MM - BLACK (2)
372294 STEEL SHIM 0.6MM - GOLD (2)
372315 COMPOSITE ECCENTRIC BUSHINGS + CASTER CLIPS (2)
372316-O ALU ECCENTRIC BUSHING 0.0MM - ORANGE (2)
372620 ADJ. TURNBUCKLE M3x17 MM - HUDY SPRING STEEL™ (2)
372650 BALL-END 4.2MM - THREADED - HUDY SPRING STEEL™ (2)
373120-O ALU SHIM 5.3x7.8x0.5MM - ORANGE (10)
373240 PIVOTBALL UNIVERSAL 6.0 MM - HUDY SPRING STEEL™(2)
373241 COMPOSITE PIVOTBALL 6.0 MM - V2 (2)
375220 FRONT WHEEL AXLE (2)
377220 FRONT UPPER PIVOT PIN 2x31MM (2)
901304 HEX SCREW SB M3x4 (10)
902305 HEX SCREW SH M3x5 (10)
902310 HEX SCREW SH M3x10 (10)
902312 HEX SCREW SH M3x12 (10)
903308 HEX SCREW SFH M3x8 (10)
903310 HEX SCREW SFH M3x10 (10)
903312 HEX SCREW SFH M3x12 (10)
960031 ALU NUT M3 (10)
964032 WASHER S 3.2 x 4.8 x 0.2 (10)
965019 E-CLIP 1.9 (10)
372211
372113
372012
FRONT UPPER ARM
#372130 MEDIUM OPTION
#372131 HARD OPTION
#372131-G GRAPHITE INCLUDED
#371114
X12’20 ALU CHASSIS
#371115
X12’20 ALU FLEX CHASSIS

7
1. FRONT SUSPENSION
RIDE HEIGHT
TRACK-WIDTH
CASTER
3x12mm
3x10mm
Tighten gently
5.3x7.8x0.5mm
3x6x0.5mm
Marked “L“ COMPOSITE BALL
2x
UPPER ARM POSITION ADJUSTMENT SHIMS
The shims influence the camber gain change.
MORE shims = less camber gain, reduced initial
steering, reduced steering sensitivity (less twitchy).
LESS shims = more camber gain, increased initial
steering, increased steering sensitivity.
Use same shim thickness on both left & right sides.
1. FRONT SUSPENSION
902310
SH M3x10
901304
SB M3x4
902312
SH M3x12
373120-O
SHIM 5.3x7.8x0.5
303121-O
SHIM 3x6x0.5
REACTIVE CASTER SETTING
= 2.5°
= 5° INITIAL SETTING
= 7.5°
2x
Use the proper matching bushings to achieve the desired front track-width
LEFT RIGHT TRACK-WIDTH
-1mm
-0.5mm
0mm
+0.5mm
+1mm
169mm
168mm
167mm
166mm
165mm
+=
The X12 has adjustable front track-width. There are 3 different bushings - 0mm centric (included
in kit), or 0.5mm or 1.0mm eccentric (optional). Use the same bushing in front and rear, and also
use the same (mirrored) orientation of the bushing on both right and left sides.
ALU ECCENTRIC BUSHINGS
#372316-O 0mm INCLUDED
#372317-O 0.5mm OPTION
#372318-O 1.0mm OPTION
903312
SFH M3x12
(INITIAL SETTING)
ALTERNATIVE FRONT POSITION
LONG WHEELBASE
ALTERNATIVE REAR POSITION
SHORT WHEELBASE
FRONT WHEELBASE ADJUSTMENT
This position has the same wheelbase as the previous
X12 car as recommended for bigger tracks and tracks
with longer sweepers.
Shorter wheel base allows the car to rotate better right
in the center of the corner to maintain corner speed and
therefore it is recommended to use on tight technical tracks
or tracks with many 180 degree corners
INITIAL SETTING
0.6mm washer (#372294 - GOLD)
The number of washers used
affects the ride height of the car,
so determine the proper amount of
shimming based on tire diameter.
DETAIL
INITIAL SETTING
903310
SFH M3x10
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED
903308
SFH M3x8
3x8mm
3x12mm
960031
ALU N M3

8
CAMBER
CASTER
1. FRONT SUSPENSION
NOTE
ORIENTATION
STEEL BALL
7.2mm 7.2mm
NOTE
ORIENTATION
DETAIL
2mm
1+0.5mm
Tighten
2x
2x
If the arm does not have enough play, remove the
clips and thin the clips slightly with sandpaper.
The arms must have free movement and not bind.
Make sure that arm moves freely.
DETAIL
901304
SB M3x4
DETAIL
Moves freely
902305
SH M3x5
FRONT UPPER ARM
#372130 MEDIUM OPTION
#372131 HARD OPTION
#372131-G GRAPHITE INCLUDED

9
1. FRONT SUSPENSION
RIDE HEIGHT
The flat of the nut must be PARALLEL to the lower arm.
2x
The thickness of shims changes the steering linkage
angle. Thicker shims gives decreased in-corner
steering, but car becomes easier to drive.
Use 3mm bump steer as INITIAL SETTING.
Marked “R“
Marked “L“
3x6x2mm
3x6x1mm
NOTE
ORIENTATION
NOTE
ORIENTATION
DETAIL
960031
ALU N M3
303122-O
SHIM 3x6x1
303123-O
SHIM 3x6x2
1. FRONT SUSPENSION
The thickness of shims used
affects the ride height of the
car, so determine the proper
amount of shimming based
on tire diameter.
Moves freely
2x
0.5mm
0.5mm
0.2mm
0.2mm (4x)
OIL
use HUDY Silicone Oil
LOW traction & bumpy track
10K cSt (#106510 HUDY 50ml)
HIGH traction & smooth track
30K cSt (#106530 HUDY 50ml)
HUDY Arm Reamer 3.0mm
372290
S 3.2x4.8x0.5
964032
S 3.2x4.8x0.2
965019
C 1.9
RIDE HEIGHT ADJUSTMENT
INITIAL SETTING
above upper arm (0.5mm)
above steering block (1.3mm)
below steering block (0.2mm)
3.0 mm
The front suspension parts were updated to eliminate
play to ensure better steering performance. The
updated holes in the steering blocks may cause a
tighter fit of the kingpin in the steering block; it is
important that the steering block moves freely but
without excessive play. If the kingpin does not insert
into the steering block easily, use a 3mm arm reamer
to enlarge the hole. Be very careful to remove only
enough material so you can insert the kingpin
without a lot of force.
FRONT COIL SPRINGS - SOFT
#372176 C=1.5 GOLD OPTION
#372177 C=2.0 SILVER OPTION
#372178 C=2.5 BLACK OPTION
#372179 C=3.0 GREY OPTION
FRONT COIL SPRINGS
#372180 C=3.5 GOLD INCLUDED
#372181 C=4.0 SILVER OPTION
#372182 C=5.0 BLACK OPTION
#372183 C=5.5 GREY OPTION
OIL
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED

10
1. FRONT SUSPENSION
FRONT COIL SPRINGS - SOFT
#372176 C=1.5 GOLD OPTION
#372177 C=2.0 SILVER OPTION
#372178 C=2.5 BLACK OPTION
#372179 C=3.0 GREY OPTION
FRONT COIL SPRINGS
#372180 C=3.5 GOLD INCLUDED
#372181 C=4.0 SILVER OPTION
#372182 C=5.0 BLACK OPTION
#372183 C=5.5 GREY OPTION
372180
372022
372620
371115
372315
902310
901304
960031
960031
372290
372330-O
303121-O
373120-O
377220
372320
970050
376366-O
372294
372293
372292 373241
BAG
903306
371211
903310
372088
902308
903306
902308
372125
372310-O
965019
372290
372280
372131-G
373240
965019
372150
372650
964032 372221
303123-O
303122-O
375220
303121-O ALU SHIM 3x6x0.5MM - ORANGE (10)
303122-O ALU SHIM 3x6x1.0MM - ORANGE (10)
303123-O ALU SHIM 3x6x2.0MM - ORANGE (10)
371115 X12’20 ALU FLEX CHASSIS 2.0MM - 7075 T6
371211 GRAPHITE BUMPER LOWER HOLDER 2.5MM
372012 COMPOSITE FRONT UPPER ARM MOUNT - RIGHT - GRAPHITE
372022 COMPOSITE FRONT UPPER ARM MOUNT - LEFT - GRAPHITE
372088 X12’20 FRONT BRACE - GRAPHITE 2.0MM
372124 X12 US GRAPHITE LOWER SUSPENSION ARM - RIGHT
372125 X12 US GRAPHITE LOWER SUSPENSION ARM - LEFT
372131-G COMPOSITE FRONT UPPER SUSPENSION ARM - GRAPHITE
372150 COMPOSITE FRONT UPPER BALL JOINT (2)
372180 FRONT COIL SPRING 3.6x6x0.5MM; C=3.5 - GOLD (2)
372211 COMPOSITE STEERING BLOCK - RIGHT - HARD - V3
372221 COMPOSITE STEERING BLOCK - LEFT - HARD - V3
372280 KING PIN (2)
372290 ALU SHIM 3.2x4.8x0.5 (4)
372292 STEEL SHIM 0.2MM - SILVER (2)
372293 STEEL SHIM 0.4MM - BLACK (2)
372294 STEEL SHIM 0.6MM - GOLD (2)
372310-O ALU LOWER GRAPHITE SUSPENSION ARM HOLDER - ORANGE
372315 COMPOSITE ECCENTRIC BUSHINGS + CASTER CLIPS (2)
372320 COMPOSITE ARM BUSHING (4)
372330-O X12’18 US ALU BUSHING - WIDTH 0.0MM (2)
372620 ADJ. TURNBUCKLE M3x17 MM - HUDY SPRING STEEL™ (2)
372650 BALL-END 4.2MM - THREADED - HUDY SPRING STEEL™ (2)
373120-O ALU SHIM 5.3x7.8x0.5MM - ORANGE (10)
373240 PIVOTBALL UNIVERSAL 6.0 MM - HUDY SPRING STEEL™(2)
373241 COMPOSITE PIVOTBALL 6.0 MM - V2 (2)
375220 FRONT WHEEL AXLE (2)
376366-O ALU MOUNT 6.0MM - ORANGE (2)
377220 FRONT UPPER PIVOT PIN 2x31MM (2)
901304 HEX SCREW SB M3x4 (10)
902306 HEX SCREW SH M3x6 (10)
902308 HEX SCREW SH M3x8 (10)
902310 HEX SCREW SH M3x10 (10)
903306 HEX SCREW SFH M3x6 (10)
903310 HEX SCREW SFH M3x10 (10)
960031 ALU NUT M3 (10)
964032 WASHER S 3.2 x 4.8 x 0.2 (10)
965019 E-CLIP 1.9 (10)
970050 O-RING 5x1 (10)
372211
372124
372012
ALU ECCENTRIC BUSHINGS
#372330-O 0mm INCLUDED
#372331-O 0.5mm OPTION
#372332-O 1.0mm OPTION
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED
FRONT UPPER ARM
#372130 MEDIUM OPTION
#372131 HARD OPTION
#372131-G GRAPHITE INCLUDED
UPPER ARM MOUNTS
#372010 RIGHT MEDIUM OPTION
#372011 RIGHT HARD OPTION
#372012 RIGHT GRAPHITE INCLUDED
#372020 LEFT MEDIUM OPTION
#372021 LEFT HARD OPTION
#372022 LEFT GRAPHITE INCLUDED
902306
#371114
X12’20 ALU CHASSIS
#371113
12‘20 GRAPHITE CHASSIS 2.5mm

11
11
970050
O 5x1
901304
SB M3x4
2x
2x
2x
CUTAWAY VIEW
DETAIL
COMPOSITE BALL
NOTE ORIENTATION
NOTE
ORIENTATION
DETAIL
1. FRONT SUSPENSION
NOTE ORIENTATION
903306
SFH M3x6
901304
SB M3x4
CASTER
3x10mm
3x8mm
5.3x7.8x0.5mm
3x6x0.5mm
REACTIVE CASTER SETTING
= 2.5°
= 5° INITIAL SETTING
= 7.5°
UPPER ARM POSITION ADJUSTMENT SHIMS
The shims influence the camber gain change.
MORE shims = less camber gain, reduced initial
steering, reduced steering sensitivity (less twitchy).
LESS shims = more camber gain, increased
initial steering, increased steering sensitivity.
Use same shim thickness on both left & right sides.
902310
SH M3x10
902308
SH M3x8
373120-O
SHIM 5.3x7.8x0.5
303121-O
SHIM 3x6x0.5
Tighten Gently
903310
SFH M3x10
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED
960031
ALU N M3

RIDE HEIGHT
TRACK-WIDTH
1. FRONT SUSPENSION
12
2x
Use the proper matching bushings to achieve the desired
front track-width
LEFT RIGHT TRACK-WIDTH
-1mm
-0.5mm
0mm
+0.5mm
+1mm
169mm
168mm
167mm
166mm
165mm
+=
The X12 has adjustable front track-width. There are 3 different bushings - 0mm centric (included
in kit), or 0.5mm or 1.0mm eccentric (optional). Use the same bushing in front and rear, and also
use the same (mirrored) orientation of the bushing on both right and left sides.
INITIAL SETTING
The number of washers used
affects the ride height of the car, so
determine the proper amount of
shimming based on tire diameter.
INITIAL SETTING
0.4mm washer (#372293 - BLACK)
0.2mm washer (#372292 - SILVER)
0.6mm washer (#372294 - GOLD)
DETAIL
903306
SFH M3x6
902306
SH M3x6
902308
SH M3x8
ALU ECCENTRIC BUSHINGS
#372330-O 0mm INCLUDED
#372331-O 0.5mm OPTION
#372332-O 1.0mm OPTION
(INITIAL SETTING)
ALTERNATIVE FRONT POSITION
LONG WHEELBASE
ALTERNATIVE REAR POSITION
SHORT WHEELBASE
FRONT WHEELBASE ADJUSTMENT
This position has the same wheelbase as the previous
X12 car as recommended for bigger tracks and tracks
with longer sweepers.
Shorter wheel base allows the car to rotate better right
in the center of the corner to maintain corner speed and
therefore it is recommended to use on tight technical tracks
or tracks with many 180 degree corners

1. FRONT SUSPENSION
13
CAMBER
NOTE
ORIENTATION
STEEL BALL
2x
7.2mm 7.2mm
NOTE
ORIENTATION
DETAIL
Moves freely
DETAIL
Make sure that arm moves freely.
DETAIL
2x
2x
2mm
Fully Tighten
1+0.5mm
If the arm does not have enough play, remove the
clips and thin the clips slightly with sandpaper.
The arms must have free movement and not bind.
FRONT UPPER ARM
#372130 MEDIUM OPTION
#372131 HARD OPTION
#372131-G GRAPHITE INCLUDED

1. FRONT SUSPENSION
RIDE HEIGHT
14
FRONT COIL SPRINGS - SOFT
#372176 C=1.5 GOLD OPTION
#372177 C=2.0 SILVER OPTION
#372178 C=2.5 BLACK OPTION
#372179 C=3.0 GREY OPTION
FRONT COIL SPRINGS
#372180 C=3.5 GOLD INCLUDED
#372181 C=4.0 SILVER OPTION
#372182 C=5.0 BLACK OPTION
#372183 C=5.5 GREY OPTION
2x
HUDY Arm Reamer 3.0mm
The front suspension parts were updated
to eliminate play to ensure better steering
performance. The updated holes in the
steering blocks may cause a tighter fit of the
kingpin in the steering block; it is important
that the steering block moves freely but
without excessive play. If the kingpin does
not insert into the steering block easily, use a
3mm arm reamer to enlarge the hole. Be very
careful to remove only enough material so you
can insert the kingpin without a lot of force.
2x
Marked "R"
Marked "L"
3x6x2mm
3x6x1mm
NOTE
ORIENTATION
DETAIL
372290
S 3.2x4.8x0.5
964032
S 3.2x4.8x0.2
965019
C 1.9
960031
ALU N M3
303122-O
SHIM 3x6x1
303123-O
SHIM 3x6x2
The flat of the nut must be PARALLEL
to the lower arm.
NOTE
ORIENTATION
Moves freely
OIL
use HUDY Silicone Oil
0.5mm (2x)
0.2mm (5x)
The thickness of shims used affects
the ride height of the car, so
determine the proper amount of
shimming based on tire diameter.
The thickness of shims changes the steering linkage
angle. Thicker shims gives decreased in-corner
steering, but car becomes easier to drive.
Use 3mm bump steer as INITIAL SETTING.
RIDE HEIGHT ADJUSTMENT
INITIAL SETTING
above upper arm (2.0mm)
3. REAR SUSPENSION
3.0 mm
LOW traction & bumpy track
10K cSt (#106510 HUDY 50ml)
HIGH traction & smooth track
30K cSt (#106530 HUDY 50ml)
OIL
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED

03
15
373016
903306
903310
373585
373591
373094-G
960031
902258
902258
378141
378141
378153
960031
373551
902306
373066
373094-G
902306
960031
960031
372650
372650
373086
901308
902306
902306
372662
372662
903306
903306
373026
902306
373033
903306
371184
903305
372650
372650
306219
902306
371190
303241
303241
960032
306219
373087
373073-O
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED
902305
902305
371183
371183
371184
3. REAR SUSPENSION
BAG
303241 BALL UNIVERSAL 5.8 MM HEX (4)
306219 COMPOSITE SET OF SERVO SHIMS (4)
371153 GRAPHITE REAR POD LOWER PLATE 2.5MM (EU SPECS)
371154 ALU 2.0MM REAR POD LOWER PLATE - 7075 T6 (US SPECS)
371183 X12’20 GRAPHITE POD LINK PLATE 2.5MM (2)
371184 X12’20 ALU POD LINK GRAPHITE PLATE HOLDER
371190 COMPOSITE POD LINK (2)
372650 BALL-END 4.2MM THREADED HUDY SPRING STEEL™(2)
372662 COMPOSITE BALL-JOINT 4.2 MM (4)
373016 ALU REAR BULKHEAD - MOTOR (RIGHT)
373026 ALU REAR BULKHEAD - LEFT
373033 GRAPHITE REAR BULKHEAD BRACE 2MM
373066 ALU PIVOT BALL
373073-O ALU REAR BRACE MOUNT 16MM- ORANGE (2)
373086 GRAPHITE REAR BRACE 2.5MM
373087 GRAPHITE BATTER BACKSTOP 2.0MM
373094-G LOWER & UPPER PIVOT BRACE - LOW ROLL-CENTER - GRAPHITE
373551 X12‘20 GRAPHITE REAR POD UPPER PLATE 2.5MM
373585 SIDE SPRING C=0.9 - GOLD (2)
373591 COMPOSITE SIDE SPRING HOLDER (2)
378141 ALU SIDE TUBE (2)
378153 COMPOSITE SIDE TUBE SHAFT (2)
901308 HEX SCREW SB M3x8 (10)
902258 HEX SCREW SH M2.5x8 (10)
902305 HEX SCREW SH M3x5 (10)
902306 HEX SCREW SH M3x6 (10)
903305 HEX SCREW SFH M3x5 (10)
903306 HEX SCREW SFH M3x6 (10)
903310 HEX SCREW SFH M3x10 (10)
960031 ALU NUT M3 (10)
960032 NUT M3 (10)
SIDE SPRINGS
#373584 C=0.6 SILVER OPTION
#373585 C=0.9 GOLD INCLUDED
#373586 C=1.2 BLACK OPTION
#373587 C=1.5 SILVER OPTION
#373588 C=1.8 GOLD OPTION
371153
371154
378153
903305

16
NOTE
ORIENTATION
NOTE
ORIENTATION
Ensure free, smooth movement
without excessive freeplay.
Lightly tighten the screws so there is no
free play, but do not overtighten otherwise
the pivotball will not move freely.
DO NOT TIGHTEN FULLY
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED
DETAIL
3. REAR SUSPENSION
903306
SFH M3x6
902306
SH M3x6
960031
ALU N M3
903310
SFH M3x10
903306
SFH M3x6
902306
SH M3x6

17
2x
Do not tighten fully,
pivotballs must turn freely.
Do not tighten fully,
pivotballs must turn freely.
2x
2x
3. REAR SUSPENSION
902258
SH M2.5x8
903306
SFH M3x6
903305
SFH M3x5
Ensure free,
smooth movement
TIGHTEN FULLY
DETAIL
DETAIL
POD Linkage position
OUTER POSITION - (INITIAL SETTING)
The side link is straight, easier to drive.
INNER POSITION
The side link is angled, increased in-corner steering.
902305
SH M3x5
902306
SH M3x6

18
NOTE
ORIENTATION
For battery backstop adjustment check page 26 / step 2.
INITIAL SETTING
3. REAR SUSPENSION
902306
SH M3x6
903306
SFH M3x6
3x6x1mm
3x6x1mm
Self-locking ALU nut M3
BLACK nut M3
902306
SH M3x6
960031
ALU N M3
960032
N M3
306219
SHIM 3x6x1
"CLICK"
0.5mm
DETAIL
901308
SB M3x8
960031
ALU N M3
902306
SH M3x6
5.0mm
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED

19
3. REAR SUSPENSION
HUDY OILS 50ml
#106410 1000cSt
#106420 2000cSt
#106430 3000cSt
#106440 3000cSt
#106450 5000cSt
#106460 6000cSt
#106470 7000cSt
#106480 8000cSt
#106510 10000cSt
The angle of the side tubes has a fine effect on
car performance.
HIGHER angle: stiffer feeling, less roll
LOWER angle (flatter): softer feeling, more roll
DETAIL
2x 2x
Add oil in each slot of the COMPOSITE
side tubes.
NOTE:
Add oil only in the slots, not on the whole tube.
After assembling the side tubes, check for smooth operation.
It is very important to re-oil the side tubes, at least once per race day.
You may use different oil thicknesses depending on track conditions.
OIL
For HIGH grip use SOFTER oils
For LOW grip or ASPHALT use HARDER oils
3x6x2.5mm
362651
SIDE SHOCK
372651
3x6x2.5mm
OPTIONAL SIDE SHOCK
Optional side shock can be used to improve traction in low- and medium-grip conditions.
The optional side shock replaces the 2 side tubes.
902308
SH M3x8
Remove Graphite Battery Backstop
NOTE
OPTIONAL PARTS (NOT INCLUDED)
#378100 Side Shock Absorber Set
#362651 Ball End 4.9mm with 8mm Thread (2)
#303120 Set of Alu Shims (0.5mm, 1.5mm, 2.5mm)
#372651 Ball Universal 4.9mm - HUDY Spring Steel™ (2)
#902308 Hex Screw SH M3x8 (10)

20
BAG
375031
960031
375051-O 930130
941438
375010
375093-O
375090-O
908258
303142-O
303143
373041
375390
375390
373041
375040
375080
930138
963030
941438
941438
375896
375080
951438
951438
4. BALL DIFFERENTIAL
303142-O ALU SHIM 3x5x0.5MM - ORANGE (10)
303143 ALU SHIM 3x5x0.25MM (10)
372072 COMPOSITE BALL-BEARING HUB (2)
373041 ALU UPPER CLAMP FOR BALL-BEARING WITH HUB
375010 REAR AXLE SHAFT - GRAPHITE - V3
375031 ALU REAR WHEEL HUB - RIGHT
375040 ALU REAR WHEEL HUB - LEFT
375051-O ALU DIFF HUB - ORANGE
375080 D-LOCK DIFF PLATE (2)
375090-O SET OF ALU SHIMS (0.5MM, 1.0MM, 2.0MM) - ORANGE
375093-O ALU SHIM 6.37x8.4x6.0MM - ORANGE (2)
375390 ALU HEX SCREW M3x8 FOR REAR WHEELS (6)
375896 COMPOSITE SPUR GEAR - 96T / 64P
908258 HEX SCREW SOCKET HEAD CAP M2.5x8 (10)
930130 CARBIDE BALL 3.175MM (12)
930138 CARBIDE BALL-BEARING AXIAL F3-8 3x8x3.5 - V2
941438 BALL-BEARING 1/4”x3/8”x1/8” RUBBER SEALED - OIL (2)
951438 BALL-BEARING 1/4” x 3/8” x 1/8” FLANGED - STEEL SEALED - OIL (2)
960031 ALU NUT M3 (10)
963030 CONE WASHER ST 3x8x0.5 (10)
SPUR GEARS
#375872 72T / 64P OPTION
#375875 75T / 64P OPTION
#375876 76T / 64P OPTION
#375878 78T / 64P OPTION
#375880 80T / 64P OPTION
#375896 96T / 64P INCLUDED
372072
372072
#373042
ALU UPPER ECCENTRIC CLAMP
GEAR DIFF - SPUR GEARS
#375776 76T / 64P OPTION
#375780 80T / 64P OPTION
#375784 84T / 64P OPTION
#375788 88T / 64P OPTION
#375792 92T / 64P OPTION
#374900
XRAY GEAR DIFFERENTIAL
1/12 PAN CAR - SET
#374900
#930230
XRAY CERAMIC BALL 3.175MM (12)
#930238
CERAMIC BALL-BEARING AXIAL F3-8 3x8x3.5
Included in set
ALU NUTS M3
#296530-B BLUE OPTION
#296530-K BLACK OPTION
#296530-O ORANGE OPTION
#960031 SILVER INCLUDED
#375012
STEEL REAR AXLE SHAFT - HUDY SPRING STEEL™
#375000
XRAY SOLID AXLE 1/12 PAN CAR - SET