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Thank you for selecting the 

JRX-S

 as your new racing sedan. The 

JRX-S

 has already distinguished itself as a top caliber racing chassis 

and as you will see, we have made every effort to produce a kit that is not only the most competitive but also easy to build and maintain. 

The simple bag-by-bag assembly sequence and easily followed instructions and drawings combined with Team Losi’s world famous quality 

fi tting parts will make building the 

JRX-S

 a most enjoyable project.

 

Before you open the fi rst bag, or start assembly, please take a moment to read through the following instructions. This will familiarize 

you with the various parts, assembly tips, and descriptions as well as the tools needed. Taking an extra moment before starting can save a 

good deal of time and assure proper assembly.

Good luck and good racing,

 

 

Team Losi  

Welcome Team Losi 

JRX-S

 Owner!

Kit/Manual Organization:

 

The kit is composed of different bags marked A through F. Each 

bag contains all of the parts necessary to complete a particular sec-

tion of the kit. Some of these bags have subassembly bags within 

them. It is essential that you open only one bag at a time and follow 

the correct assembly sequence, otherwise you may face diffi culties in 

fi nding the correct part. It is helpful to read through the instructions 

for an entire bag prior to beginning assembly. Next to each of the step 

numbers is a check box. At the completion of each step, place a check 

in this box so that if you must stop and come back to the assembly, 

you will be able to pick up where you left off.

 

For  your  convenience,  an  actual-size  Hardware  Identifi cation 

Guide is included as a fold-out page at the back of this manual. The 

hardware in each step is called out with an icon which contains a 

small picture of the part genre 

(referenced  on  the  Hardware 

Identifi cation Guide), the quan-

tity  of  that  part  required  for 

what is shown in the step, and 

the size or name of that part. To 

check a part, hold it against the silhouette until the correct part is 

identifi ed. Associated with each of these parts, in the Hardware Iden-

tifi cation Guide, is a LOSA-Number which is used when ordering 

replacement parts for your 

JRX-S

. In some cases, extra hardware has 

been supplied for parts that may be easy to lose.

 

Components  used  in  each  step  are  identifi ed  by  their  relative 

LOSA-Number  and  the  component’s  name. With  the  exception  of 

a few parts, these are not referenced in the Hardware Identifi cation-

Guide.

 

The molded parts in Team Losi kits are manufactured to demand-

ing tolerances. When screws are tightened to the point of being snug, 

the parts are held fi rmly in place. For this reason, it is very important 

that screws not be overtightened in any of the plastic parts.

 

In  some  steps  there  will  be  a  fi lled  black  circle  with  a  white 

number. These indicate the specifi c order by which assembly must 

occur. In cases where steps are repeated (front/rear or left/right) these 

numbers may be omitted. Please note that these numbers will not call 

out every sub-step required for the step’s assembly procedures, they 

will only highlight the critical order required for assembly.

 

In each step, there are specifi c “Detail Icons” (shaped like a stop 

sign) that call out critical precautions or assembly tips for the pro-

cess. There is a reference key that describes the meaning of each of 

the icons located on the fold-out Hardware Identifi cation Guide at 

the back of this manual.

 

To ensure that parts are not lost during construction, it is rec-

ommended that you work over a towel or mat to prevent parts from 

rolling away.

IMPORTANT SAFETY NOTES:

1.  Select an area for assembly that is away from the reach of small 

children.  

Some parts in this kit are small and can be swallowed 

by  children,  causing  choking  and  possible  internal  injury; 

PLEASE USE CAUTION!

2.  The shock fl uid and greases supplied should be kept out of chil-

dren’s reach.

 They are not intended for human consumption!

3.  Exercise care when using any hand tools, sharp instruments, or 

power tools during construction.

4.  Carefully read all manufacturer’s warnings and cautions 

for any 

chemicals, glues, or paints that may be used for assembly and 

operating purposes.

Note:  Final  kit  weight  will  vary  depending  on  accessories  used.

*All measurements taken at ride height (5mm).

Overall Length w/o Body: 14-7/8” (378mm)

Wheelbase: 10-3/16” (259mm)

*Front Track Width: 7-5/16” (186mm)

Overall Length w/Body: 16-7/8” (429mm)

*Height: 4-1/2” (114mm)

*Rear Track Width: 7-3/8” (188mm)

Table 1:  JRX-S Completed Kit Specifi cations.

INTRO

Introduction to the JRX-S Manual

STEP I-01

JRX-S COMPLETED KIT SPECIFICATIONS

Summary of Contents for JRX-S

Page 1: ......

Page 2: ...cases extra hardware has been supplied for parts that may be easy to lose Components used in each step are identi ed by their relative LOSA Number and the component s name With the exception of a few...

Page 3: ...ameter I D x outside diameter O D Shafts and pins are referred to by diameter x length Washers are described by inside diameter or the screw size that will pass through the inside diameter x the thick...

Page 4: ...e Optional ALL Table 2 Servo Installation Table for the JRX S Expert Racing Sedan Ensure the servo gear is centered before attaching the Servo Horn This is best accomplished by connecting the servo to...

Page 5: ...ervo Mounts are secured to the Chassis ensure the servo is centered in between the Mounts and tighten the four 4 40 x 3 8 Cap Head Screws BAG A Servo Installation STEP A 03 Steering Assembly STEP A 04...

Page 6: ...3 3 3 Top Plate Rear A4302 A1543 Steering Link BAG A Top Plate Installations STEP A 06 Bag A Completed Assembly STEP A 07 4 40 x 5 16 x6 4 40 x 3 8 x2 4 x 030 x2...

Page 7: ...DE Front Rear A3323 Spool Hub Front A3323 Drive Pulley CENTER DRIVE HUB SPOOL CONFIGURATION 8 9 Center Shaft A3320 5 SEE STEP B 01 OR SPOOL HUB SEE STEP B 01 4 7 1 2 3 EITHER ONE WAY REAR DRIVE HUB 6...

Page 8: ...ff Acentric into the HIGH position to install the Diff Apply a small amount of Clear Diff Grease to the Diff Outdrive and the Diff Tube before installing the Diff Ring Apply enough Clear Diff Grease t...

Page 9: ...ive Hub A3970 Spur Gear 128T 64P Spool Drive Hub CENTER ONE WAY ASSEMBLY CENTER SPOOL ASSEMBLY BAG B Spur Gear Installation STEP B 05 Bag B Completed Assembly STEP B 06 4mm E Clip x1 0 067 x 7 16 x1 S...

Page 10: ...nstall cut length of heat Shrink Tubing over Coupler and apply heat to shrink Trim excess Shrink Tubing ush with Coupler Ensure Free Movement See Setup Guide for Droop and Up Travel adjustments Shrink...

Page 11: ...vot Blocks to the Chassis Install each Locating Pin Screw so that the threads do not protrude from the bottom of the part but the smooth portion does BAG C Front Shock Tower Assembly STEP C 03 Front S...

Page 12: ...lling the short Rod Ends Be sure to install the assembled Tierod onto the car with the chamfer beveled portion of the square on the driver s right side for easier adjustment later CAUTION Ensure the d...

Page 13: ...y Synthetic White Grease to the Axle and Coupling Assemble the Coupling Dogbone and Pin then tighten the Set Screw Ensure Free Movement See Setup Guide for Droop and Up Travel adjustments CVD and Hub...

Page 14: ...he Pivot Blocks to the Chassis Install each Locating Pin Screw so that the threads do not protrude from the bottom of the part but the smooth portion does Rear Shock Tower Assembly STEP D 03 BAG D Rea...

Page 15: ...rt Rod Ends Be sure to install the assembled Tierod onto the car with the chamfer beveled portion of the square on the driver s right side for easier adjustment later Tierod Assembly and Installation...

Page 16: ...k Oil until the Oil is ap proximately 1 16 from the top of the Body Work the Shock Shaft up and down a few times This will re lease the air bubbles trapped beneath the Piston Place the lled Shock in t...

Page 17: ...Recall Place shocks containing two dots on the cap on the left side of the car and the shocks containing one dot on the cap on the right side of the car BAG E Front Shock Installation STEP E 03 Rear S...

Page 18: ...na Cap It is very important to keep the servo wires away from the drivetrain components It is recommended to use a small piece of double sided tape to hold the wire to the Chassis away from the Spur G...

Page 19: ...rol Wires to the Rear Top Plate by sticking them down with two Battery Foam pads When setting the gear mesh leave a small amount of back lash for proper function Too much backlash will cause fail ure...

Page 20: ...p in hole 11 for SKODA2 Body Place Body Clip in hole 5 for SKODA2 Body Mount the Tires of choice per the manufacturer s speci cations BAG F Battery and Tray Installation STEP F 06 Wheel and Body Clip...

Page 21: ...e Body which can be used as a guide for trimming Make ve 13 64 diameter holes at the locations marked with dimples There are two on the front hood two on the back window and one on the roof These will...

Page 22: ...19 19 19 A8063 Skoda2 Body and Wing 4 40 x 5 16 Al x2 FL 4 40 x 1 4 x2 Bag F Completed Assembly STEP F 09 BAG F...

Page 23: ...he car rolls straight when you are not touching the steering wheel stick If the servo was installed correctly as per Table 1 the wheels should turn equally to the left and right If this is not the cas...

Page 24: ...Negative camber means that the top of the tire leans in toward the chassis Positive camber means the top of the tire leans out away from the chassis Camber can be precisely measured with after market...

Page 25: ...e blocks for adjustment Running less inboard front toe 0 degree will result in more stability by decreasing steering into a turn Increasing inboard front toe 2 degrees will provide more aggressive fee...

Page 26: ...keep the car from rolling leaning making the car react faster and have more traction A low roll center allows the car to roll more and react slower reducing responsiveness in and out of turns Testing...

Page 27: ...24...

Page 28: ...6 Solid LCD A3335 067 x 7 16 Solid A6401 3 32 x 930 Hinge A6081 1 8 x 2 125 Hinge A6094 065 x 7 16 Solid CVD A9933 067 x 5 16 Solid A6406 L 4 40 x 3 16 Mini A6306 L 4 40 x 1 4 A6308 L 8 32 x 11 32 A63...

Page 29: ...26...

Page 30: ......

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