Xray X12 User manual

2
BEFORE YOU START
The X12 is a high-competition, high-quality, 1/12 pan 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 fulll 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 X12, 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 The X12
is not what you wanted or expected, do not continue any further. Your hobby
dealer cannot accept your X12 kit for return or exchange after it has been
partially or fully assembled.
Contents of the box may dier from pictures. In line with our policy of continuous
product development, the exact specications 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 eects 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 ngers or any objects inside rotating and moving parts, as this may
cause damage or serious injury as your nger, 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, ying 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 o the receiver before turning your transmitter o.
• Keep the wheels of the model o 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 suers 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 conict with or disrupt pedestrian or vehicular trac.
• 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.
Failure to follow these instructions will be considered as abuse and/or neglect.
CUSTOMER SUPPORT
XRAY Europe
K Vystavisku 6992
91101 Trenčín
Slovakia, EUROPE
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
We have made every eort to make these instructions as easy to understand as
possible. However, if you have any diculties, 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 nd 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]

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 R/C models with damaged wires. A damaged wire
is extremely dangerous, and can cause short-circuits resulting in re. 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 re 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 re. 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 rectied
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 nished.
• 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 re.
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 modication 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 nd 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 oer 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 modications 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 nal 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 #106371 100ml)
3000cSt (HUDY #106431 100ml)
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
CASTER
3x12mm
3x10mm 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.
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
ALU ECCENTRIC BUSHINGS
#372316-O 0mm INCLUDED
#372317-O 0.5mm OPTION
#372318-O 1.0mm OPTION
ALU NUTS M3
#296530-B ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU SILVER INCLUDED
COMPOSITE SUSPENSION ARMS
#372112 RIGHT HARD INCLUDED
#372113 RIGHT GRAPHITE OPTION
#372122 LEFT HARD INCLUDED
#372123 LEFT GRAPHITE OPTION
UPPER ARM MOUNTS
#372010 RIGHT MEDIUM OPTION
#372011 RIGHT HARD INCLUDED
#372012 RIGHT GRAPHITE OPTION
#372020 LEFT MEDIUM OPTION
#372021 LEFT HARD INCLUDED
#372022 LEFT GRAPHITE OPTION
372180
372021
372620
371109
372315
902312
901304
960031
372290
372316-O
303121-O
373120-O
377220
372122
372292
372293
372294 373241
BAG
903312
902310
965019
372290
#371110
X12’18 ALU CHASSIS 2.0MM - 7075 T6
372280
372131
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)
371109 X12‘18 GRAPHITE CHASSIS 2.5MM
372011 COMPOSITE FRONT UPPER ARM MOUNT - RIGHT - HARD
372021 COMPOSITE FRONT UPPER ARM MOUNT - LEFT - HARD
372112 COMPOSITE SUSPENSION ARM FRONT LOWER - RIGHT - HARD
372122 COMPOSITE SUSPENSION ARM FRONT LOWER - LEFT - HARD
372131 COMPOSITE FRONT UPPER SUSPENSION ARM - HARD
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)
902310 HEX SCREW SH M3x10 (10)
902312 HEX SCREW SH M3x12 (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
372112
372011
902310
SH M3x10
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°

7
CAMBER
CASTER
1. FRONT SUSPENSION
The flat of the nut must be PARALLEL to the lower arm.
7.2mm 7.2mm
NOTE
ORIENTATION
NOTE
ORIENTATION
STEEL BALL
DETAIL
2mm
1+0.5mm
2x
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.
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.
Make sure that arm moves freely.
Moves freely
Marked “R“
Marked “L“
3x6x2mm
3x6x1mm
NOTE
ORIENTATION
NOTE
ORIENTATION
DETAIL
DETAIL
DETAIL
ALU NUTS M3
#296530-B ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU SILVER INCLUDED
1. FRONT SUSPENSION
901304
SB M3x4
960031
ALU N M3
303122-O
SHIM 3x6x1
303123-O
SHIM 3x6x2

8
RIDE HEIGHT
RIDE HEIGHT
TRACK-WIDTH
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
2x
0.5mm 0.5mm
0.2mm
0.2mm (4x)
OIL
use HUDY Silicone Oil
LOW traction & bumpy track
10K cSt (#106511 HUDY 100ml)
HIGH traction & smooth track
30K cSt (#106531 HUDY 100ml)
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.
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
ALU ECCENTRIC BUSHINGS
#372316-O 0mm INCLUDED
#372317-O 0.5mm OPTION
#372318-O 1.0mm OPTION
Arm Reamer 3.0mm
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.
1. FRONT SUSPENSION
372290
S 3.2x4.8x0.5
964032
S 3.2x4.8x0.2
965019
C 1.9
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
RIDE HEIGHT ADJUSTMENT
INITIAL SETTING
above upper arm (0.5mm)
above steering block (1.3mm)
below steering block (0.2mm)
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

1. FRONT SUSPENSION
9
970050
O 5x1
2x
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
ALU NUTS M3
#296530-B ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU SILVER INCLUDED
UPPER ARM MOUNTS
#372010 RIGHT MEDIUM OPTION
#372011 RIGHT HARD INCLUDED
#372012 RIGHT GRAPHITE OPTION
#372020 LEFT MEDIUM OPTION
#372021 LEFT HARD INCLUDED
#372022 LEFT GRAPHITE OPTION
CUTAWAY VIEW
DETAIL
COMPOSITE BALL
372180
372021
372620
371110
372315
902310
901304
960031
372290
372330-O
303121-O
373120-O
377220
372320
970050
376366-O
372294
372293
372292 373241
BAG
903306
903306
902308
902306
372125
372310-O
965019
372290
372280
372131
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)
371110 X12’18 ALU CHASSIS 2.0MM - 7075 T6
372011 COMPOSITE FRONT UPPER ARM MOUNT - RIGHT - HARD
372021 COMPOSITE FRONT UPPER ARM MOUNT - LEFT - HARD
372124 X12’18 US GRAPHITE LOWER SUSPENSION ARM - RIGHT
372125 X12’18 US GRAPHITE LOWER SUSPENSION ARM - LEFT
372131 COMPOSITE FRONT UPPER SUSPENSION ARM - HARD
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)
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
372011
ALU ECCENTRIC BUSHINGS
#372330-O 0mm INCLUDED
#372331-O 0.5mm OPTION
#372332-O 1.0mm OPTION
NOTE ORIENTATION
NOTE
ORIENTATION
DETAIL
#371109
X12‘18 GRAPHITE CHASSIS 2.5MM

1. FRONT SUSPENSION
10
RIDE HEIGHT
TRACK-WIDTH
901304
SB M3x4
2x
2x
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
901304
SB M3x4
NOTE ORIENTATION
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
903306
SFH M3x6
903306
SFH M3x6
902306
SH M3x6
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
11
CAMBER
7.2mm 7.2mm
NOTE
ORIENTATION
NOTE
ORIENTATION
STEEL BALL
2x
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.

1. FRONT SUSPENSION
RIDE HEIGHT
12
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
Arm Reamer 3.0mm
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.
2x
Marked "R"
Marked "L"
3x6x2mm
3x6x1mm
NOTE
ORIENTATION
DETAIL
ALU NUTS M3
#296530-B ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU SILVER INCLUDED
3. REAR SUSPENSION
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
LOW traction & bumpy track
10K cSt (#106511 HUDY 100ml)
HIGH traction & smooth track
30K cSt (#106531 HUDY 100ml)
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)

03
13
373014
903306
903310
373585
373591
373094
960031
902258
378141
378141
378153
378153
960031
373550
902306
373066
373094
902306
960031
960031
372650
372650
373085 901308
902306
372662
372662
903306
373024
902306
373033
903306
372650
372650
306219
903306
371190
303241
960032
306219
373073-O
ALU NUTS M3
#296530-B ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU SILVER INCLUDED
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)
371190 COMPOSITE POD LINK (2)
372650 BALL-END 4.2MM THREADED HUDY SPRING STEEL™(2)
372662 COMPOSITE BALL-JOINT 4.2 MM (4)
373014 ALU REAR BULKHEAD - MOTOR (RIGHT)
373024 ALU REAR BULKHEAD - LEFT
373033 GRAPHITE REAR BULKHEAD BRACE 2MM
373066 ALU PIVOT BALL
373073-O ALU REAR BRACE MOUNT 16MM- ORANGE (2)
373085 GRAPHITE REAR BRACE 2.5MM
373094 COMPOSITE LOWER & UPPER PIVOT BRACE - LOW ROLL-CENTER
373550 X12‘18 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)
902306 HEX SCREW SH M3x6 (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

14
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 ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU 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

15
2x
NOTE ORIENTATION
POD Linkage position
OUTER POSITION - the side link is straight, easier to drive
INNER POSITION - the side link is angled, increased in-corner steering
Ensure free,
smooth movement
Do not tighten fully, pivotballs
must turn freely.
Do not tighten fully,
pivotballs must turn freely.
"CLICK"
0.5mm
2x
TIGHTEN FULLY
NOTE ORIENTATION
REAR BRACE
DETAIL
ALU NUTS M3
#296530-B ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU SILVER INCLUDED
DETAIL
DETAIL
DETAIL
3. REAR SUSPENSION
902258
SH M2.5x8
903306
SFH M3x6
306219
SHIM 3x6x2
901308
SB M3x8
960031
ALU N M3
902306
SH M3x6
903306
SFH M3x6
INITIAL SETTING

16
HUDY OILS 100ml
#106411 1000cSt
#106421 2000cSt
#106431 3000cSt
#106441 3000cSt
#106451 5000cSt
#106461 6000cSt
#106471 7000cSt
#106481 8000cSt
#106511 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
3x6x2.5mm
362651
OPTIONAL 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.
3x6x1mm
3x6x1mm
Self-locking ALU nut M3
BLACK nut M3
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)
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
ALU NUTS M3
#296530-B ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU SILVER INCLUDED
3. REAR SUSPENSION
902306
SH M3x6
960031
ALU N M3
960032
N M3
902308
SH M3x8
306219
SHIM 3x6x1

BAG
17
375031
375051-O
960031
930130
941438
375010
375093-O
375090-O
908258
303142-O
303143
373040
375390
375390
373040
375040
375080
930138
963030
941438
941438
375896
375080
951438
951438
ALU NUTS M3
#296530-B ALU BLUE OPTION
#296530-K ALU BLACK OPTION
#296530-O ALU ORANGE OPTION
#960031 ALU SILVER INCLUDED
4. BALL DIFFERENTIAL
303142-O ALU SHIM 3x5x0.5MM - ORANGE (10)
303143 ALU SHIM 3x5x0.25MM (10)
373040 ALU UPPER CLAMP FOR BALL-BEARING
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
941438 HIGH-SPEED BALL-BEARING 1/4“x3/8“x1/8“ RUBBER SEALED (2)
951438 BALL-BEARING 1/4“ x 3/8“ x 1/8“ FLANGED (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
#375012
STEEL REAR AXLE SHAFT - HUDY SPRING STEEL™

18
DIFFERENTIAL
RIDE HEIGHT
NOTE
ORIENTATION
NOTE
ORIENTATION
This nut affects the tightness and
stiffness of the rear differential.
Tighten the nut gently so the diff
does not slip under power, but do
not overtighten or the diff balls
and/or plates may be damaged.
IMPORTANT
3x5x0.5mm
3x5x0.5mm
2x
To set track-width, use the hole in the carbon pod plate as the
centre point; this hole should always be centred between the two
rear wheels once overall track-width is set. To set the track-width
more easily, set the car on a ruler or use a digital vernier caliper.
Rear track-width is directly affected by wheel offsets, which can
vary depending on tire brand.
The thickness of shims used affects the ride height of the car, so determine the
proper amount of shimming based on tire diameter.
IMPORTANT: Always use the same thickness of shims on both left & right sides.
For INITIAL SETTING, use (2x) 3x5x0.5mm on both left & right sides.
Optionally included: (4x) 3x5x0.25mm shims for fine tuning.
Bearing Oil
(HUDY #106230)
OIL
Flanged
Do not use for basic set-up
6.4x8.4x6mm
Must be used always.
NOTE
ORIENTATION
NOTE
ORIENTATION
NOTE
ORIENTATION
Diff Grease
(HUDY #106211)
Bearing Oil
(HUDY #106230)
Diff Grease
(HUDY #106211)
OIL
Bearing Oil
(HUDY #106230)
OIL
Diff Grease
(HUDY #106211)
Diff Grease
(HUDY #106211)
8.0mm 7.8mm
3.0mm
3.2mm
LEFT = RIGHT
DETAIL
Flanged
DETAIL
The axle must have a VERY small
amount of side play. If there is no
side play, the axle may bind and
damage the ball-bearings.
DETAIL
4. BALL DIFFERENTIAL
951438
BB 1/4“x3/8“x1/8“
375090-O
6.4x8.4x1.0
375093-O
6.4x8.4x6.0
375090-O
6.4x8.4x0.5
908258
SCH M2.5x8
930138
BA 3x8
941438
BB 1/4“x3/8“x1/8“
930130
B 3.1
963030
ST 3x8
960031
ALU N M3
375390
ALU SCH M3x8
303142-O
SHIM 3x5x0.5
303143
SHIM 3x5x0.25
#375012
STEEL REAR AXLE SHAFT HUDY SPRING STEEL™
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
Optional steel rear axle offers better durability as it will
not break even in serious crashes, however add extra
weight and decreases slightly steering response

BAG
19
378011
378011
378061
971022
378030-O
378093
901303
378011
378071-O
378050-O
378080
378020
378011
378040-O
378070-O
965015
HUDY SHOCK OILS - 100ml
#106311 100cSt OPTION
#106316 150cSt OPTION
#106321 200cSt OPTION
#106326 250cSt OPTION
#106331 300cSt OPTION
#106336 350cSt OPTION
#106341 400cSt OPTION
#106346 450cSt OPTION
#106351 500cSt OPTION
#106356 550cSt OPTION
#106361 600cSt OPTION
#106366 650cSt OPTION
#106370 700cSt INCLUDED
#106376 750cSt OPTION
#106381 800cSt OPTION
#106391 900cSt OPTION
#106411 1000cSt OPTION
#106421 2000cSt OPTION
Carefully remove the shock piston from the
frame, and remove all excess plastic flash.
5. SHOCK ABSORBER
378001 SHOCK ABSORBER SET
378011 COMPOSITE SHOCK PARTS - FRAME
378020 ALU THREADED SHOCK BODY - HARDCOATED
378030-O ALU SHOCK BODY CAP - LOWER - ORANGE
378040-O ALU SHOCK ADJUSTABLE COLLAR - ORANGE
378050-O ALU SHOCK BODY CAP - UPPER - ORANGE
378061 SHOCK SHAFT
378070-O ALU SHOCK SPRING COLLAR - ORANGE
378071-O ALU SHOCK ADAPTER - ORANGE
378080 SHOCK RUBBER MEMBRANE (2)
378093 SHOCK SPRING - GOLD
901303 HEX SCREW SB M3x3 (10)
965015 E-CLIP 1.5 (10)
971022 SILICONE O-RING 2x2 (10)
965015
C 1.5
SHOCK SPRINGS
#378092 C=1.5 SILVER OPTION
#378093 C=1.8 GOLD INCLUDED
#378094 C=2.1 BLACK OPTION
#378095 C=1.4-1.9 BLACK OPTION

20
➊ ➋ ➌ ➍ ➎ ➏
➐
Gently push the shock shaft
completely into the shock
body. Excess oil will flow
through the hole in the
shock cap.
Keep the shock shaft
pushed in the shock body
and tighten the shock cap
completely.
Tighten the cap fully but
do not overtighten or the
rubber membrane may be
damaged. Make sure that
there is no oil leakage
after the cap is tightened.
HALF TIGHTEN TIGHTEN FULLY
100%
Extend the shock shaft
completely. Fill the shock
body with the shock oil.
Move the shock shaft up and
down a few times to release
the air bubbles trapped
beneath the piston.
Orient the filled shock
vertically for several
minutes with the shock
shaft fully extended. The
remaining air bubbles will
release.
Install the shock
membrane into the groove
in the upper shock cap.
Gently place the shock cap
assembly onto the filled
shock body. Excess oil will
spill from the shock. Screw
the shock cap onto the body
by only a few turns, approx.
50%. Excess oil will flow
through the hole in the
shock cap.
3~5x
UP & DOWN
50%
Follow the steps below to set the shock.
Oil 700cSt
DEFAULT SHOCK SETTING FOR CENTER SHOCK ABSORBER
Shock Oil
OIL
Shock Oil
OIL
5. SHOCK ABSORBERS
971022
O 2x2