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R/C Tech Forums Thread Wiki: Xray XB2 2WD Buggy Thread
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Last edit by: dgrobe2112
Instruction manuals: (C/O BentKa)

Xray XB2 Carpet Edition Instruction Manual
http://www.teamxray.com/xb2/2016/dow...ual_v2_low.pdf

Xray XB2 Dirt Edition Instruction Manual
http://www.teamxray.com/xb2/2016/dow...w.pdf?update=2

BentKa: Carpet Edition 4 gear to 3 gear laydown conversion parts:
  • Gearbox #323014
  • Motorplate #324012
  • 36T idler gear #324236
  • Brace for waterfall #324031


Socket: Bodies Available:

Xray has two OEM bodies, the .75mm and the .50mm light weight:
light weight: https://www.amainhobbies.com/xray-xb...329701/p492942

OEM .75mm: https://www.amainhobbies.com/xray-0....329700/p477762

Also, I've fitted the yz2 body, both the light and regular fit fine, just make your own cut lines:
https://www.amainhobbies.com/yokomo-...z2-101/p417674


[i] J Concepts S2 Body [i]


Penguin Racing makes a high grip body that fits the DE and CE:
http://www.ebay.com/itm/X-Ray-Xb2-Hi...oAAOSw1S9WewHV



Socket: Wheel fitment:

According to some, you'll require different offset rear hexes to use B5M wheels. According to my Hudy setup board, B5M wheels are the same offset. I measured the overall width of the car with XB2 wheels, and then again with B5M wheels, same measurement.

On the front, B5M wheels were 1.5mm wider. Xray offers hexes to reduce width -.75 on each side, or you could spend 3-5 minutes and sand your OEM hexes down .75mm.

edit by dgrobe2112
here are the hubs for losi and AE

for AE Front 365354 -0.75
for Losi rear 365358 +3.00 (4 stripe)
for AE rear 365359 +3.75 (5 stripe)



Socket: Flex and the XB2:

Flex screws are as follows:

Plastic bulkhead between motor and waterfall. Can remove screw in chassis, or remove bulkhead altogether.

Waterfall has 4 screws, can remove the inner two or outer two. IIRC, removing the inner two provides more flex, and thus more bite.

Removing the battery brace. This gives a tremendous amount of flex on the middle of the car, and can sometimes be inconsistent. I do this for outdoor racing on low bite. I like the feel over the 4 gear in 17.5 racing, since the 4 gear will take some snap away off the corner.

Rear C block - has inner and outer screws. I haven't played with this, as it's a crucial pivot point of the car.

Medium arms and towers -> I don't believe the carpet car has the rear medium tower available, however the DE DOES have an optional hard part. I think the hard parts are more consistent, especially when it gets hot (90+ degrees F). However, the medium parts do NOT break unless you're severely talented. They also don't wear out.



Socket: Avid/Schelle Slipper mod:

Credit to WillS, Matt Trimmings, and myself for figuring this out months ago.

Parts you'll need:

B5M V2 3gear compatible top shaft.
TKO Special 5x13x5 bear OR 5x13x6 bearing Either can work. This replaces the spur side bearing on the top shaft.
5mm shims, same shims used in 1/8th scale clutch bells. Look for protek .1mm and .2mm kit.
Avid or Schelle b5m top shaft kit, with spur gears of your choosing. (DE can't handle a 69, the CE can)

Shimming: You'll need to install the bearing in the front portion of the removable piece for the shaft. Make sure the bearing is pushed all the way in. With the TKO bearing, you'll need to shim approximately 1.4mm on the front side of the top shaft. Roughly .3-.5mm with the other bearing. This is a "feel" and tolerance setting. I urge you to watch videos about setting clutch bell play in 1/8th scale to get an idea of what yield you want for end play. Too tight, it'll eat bearings.

Outside of trans case: Use Avid/Schelle top shaft spacer plus .2mm shim to offset slipper from motor plate perfectly. Install slipper as instructed, and use Avid/Schelle spring and XB2 slipper nut.

- NEW - Schelle now sells Xb2 Topshafts. They include a spacer, so no need for shims in gearbox, and comes with the smaller bearing. Both methods work.

Socket: Yokomo Differential or MIP pucks:

Credit to: WillS for figuring out pucks, and as well fitting the Losi 22 diff with the same mods.

Parts needed: Yokomo Bmax2 or YZ2 complete diff OR Mip PUCKS outdrives
Xb2 diff gear
Bmax2 V3 Worlds rear dog bones, or Bmax 2 pucks dog bones
You'll use XB2 axles, and will require no other mods for the axles or dog bones.
You'll need .2mm outdrive/diff shims. Shim approximately .5mm on each side of the diff, behind the bearings. The top portion of the transmission is what "sets" the diff in place, not the bottom half. A little play back and forth is fine, the stock diff has some play from the factory.

dgrobe2112: CE to DE conversion:
along with the parts needed.. you MUST have these following hardware, or it wont work

https://www.teamxray.com/xb2/2016/do...conversion.pdf

(3) XRAY 902340 M3x40 button head screws. these are the screws that mount the motor mount to the tranny
(4) XRAY 903322 M3x22 counter sunk screws. these are for the rear diff case, to mount to the chassis. i think i used some M3x18 and they worked ok.

Socket: Best method for setting up the XB2 ball diff:

The XB2 diff is stellar when setup correctly. The spring is too short and soft, allowing the diff to slip. You'll need to glue the rings to the outdrives with just a drop of CA, then add a 1mm shim between the spring and the outdrive. This preloads the spring and stops the diff from slipping so easily.

OR, you can run the AE diff spring, which is both slightly longer, and stiffer. The overwhelming issue is the stock spring allows the nut to bottom out on the outdrive before the diff is tight enough.

This shim:
https://www.amainhobbies.com/xray-al...a303122/p12070

This diff spring (don't need a shim, then.)

https://www.teamassociated.com/parts...thrust_spring/

Functional Aftermarket parts: (Not just bling!)

Servo Horn: (The B5M sized horns are too short to get full throw)
https://www.amainhobbies.com/protek-...800-bk/p273496


Socket: Exotek has a full suite of parts, some bling, some not. Here's a list (all fit DE and CE, unless otherwise noted):

Titanium front axles: http://www.exotekracing.com/xb2-titanium-front-axles-2/

Rear Hanger, HD (Adds 4 grams): http://www.exotekracing.com/xb2-rear...75-heavy-duty/

Brass C block, 18 grams added: http://www.exotekracing.com/xb2-rear...-brass-weight/

Alloy front camber mount: http://www.exotekracing.com/xb2-fron...er-mount-7075/

Carbon Fiber Chassis: http://www.exotekracing.com/xb2-carb...m-plate-2-5mm/

Alloy rear hubs:http://www.exotekracing.com/xb2-allo...ub-set-2-7075/

Alloy servo mounts, allow for use of LP servo:http://www.exotekracing.com/xb2-xb4-...-alloy-1-pair/

Titanium shock mounts: http://www.exotekracing.com/xb2-xb4-...shock-posts-2/

Slipper Eliminator: http://www.exotekracing.com/xb2-direct-spur-mount/
Xray eliminator is #324100

dgrobe2112: 2016-2017 new 3 gear laydown
Gearbox #323014
Motor plate #324012
36T idler gear #324236
Brace for waterfall #324031

dgrobe2112: Xray Spring Rate Conversion:
front C WHT
368174 2 str 0.65-0.85 3.71-4.85

358184 2 dot 0.65 3.71
368185 3 dot 0.72 4.11
368186 4 dot 0.80 4.57


Rear
368273 2 str 0.35-0.45 2.00-2.57

368284 1 Dot 0.35 2.00
368285 2 Dot 0.40 2.28
368286 3 Dot 0.45 2.57
368287 4 Dot 0.50 2.86

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Old 03-08-2016, 09:16 PM   #1831
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dual rate max i assume I put the horn to the right less to trim out and got full lock you'll be 90% one way and 100% the other
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Old 03-08-2016, 09:18 PM   #1832
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I also have it just to the right and didn't have to reall trim it. I'm thinking the steering link may need to be longer
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Old 03-08-2016, 09:20 PM   #1833
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Quote:
Originally Posted by Photocycler View Post
I also have it just to the right and didn't have to reall trim it. I'm thinking the steering link may need to be longer
pic ?
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Old 03-09-2016, 01:49 AM   #1834
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Anyone run Trinity pinion gears, or is everyone running Xray? Just curious as to fit and mesh with the spur. Thanks.
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Old 03-09-2016, 02:10 AM   #1835
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Quote:
Originally Posted by avaldes View Post
Anyone run Trinity pinion gears, or is everyone running Xray? Just curious as to fit and mesh with the spur. Thanks.
Im running trinity pinions, meshes perfectly.
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Old 03-09-2016, 07:41 AM   #1836
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Regarding steering trim using I'm using Savox low profile black edition servo with Futaba 4GRS radio. EPA set a 119 & 117 in order to just max out steering L & R. With the steering link backed off 1 turn steering trim set to about 30 (Finest trim setting) in order for the car to track straight with servo horn centered. With these setting I'm able to get max steering equally both left & right. Then using D/R to back off steering some.

If you try to lengthen steering link too much to compensate for wheels not being 100% straight (Wheels point slightly to the left with steering link set as per manual & with servo horn in center position) I seem to loose max steering in 1 direction. I also tried to center steering using sub-trim but also seemed to loose some max steering in 1 direction. It's possible maybe I have to re position servo horn 1 position towards left side of car just off center to have wheels pointed straight with out using radio to compensate.

Last edited by Marvel; 03-09-2016 at 08:16 AM.
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Old 03-09-2016, 09:58 AM   #1837
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Yeah some servos take a little trim other take more my futaba is spot on I have n the past took the gear out turned it a few teeth.... it's a trivial thing
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Old 03-09-2016, 10:34 AM   #1838
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Quote:
Originally Posted by Customworksking View Post
Yeah some servos take a little trim other take more my futaba is spot on I have n the past took the gear out turned it a few teeth.... it's a trivial thing
Anyone that has taken a servo apart knows that you can adjust where the splines line up. If it is off a little then use the 'subtrim' on your radio. If it is more than 10 off center you need to take the servo apart and realign it by hand. Some come from factory with the splines off 10 degrees. Most are much closer to 2, but very few are true zero alignment with the top spline.
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Old 03-09-2016, 11:12 AM   #1839
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>>>>>>agree<<<<< ^^^^^^^___^^^^^^^
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Old 03-09-2016, 04:05 PM   #1840
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Can you put the shocks on rear of the tower on the Dirt edition?
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Old 03-09-2016, 04:38 PM   #1841
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Quote:
Originally Posted by jmoneym View Post
Can you put the shocks on rear of the tower on the Dirt edition?
They are mounted on the rear of the tower by default...simply look at any of the pictures of the dirt edition.
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Old 03-09-2016, 05:16 PM   #1842
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On the steering - I ended up putting several millimeters of spacers between the two ball cups to get mine lined up close. I should probably get a longer piece of threaded rod to go inside but haven't had any problems with it coming loose racing on both carpet and turf yet.
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Old 03-09-2016, 05:24 PM   #1843
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My Dirt version kit is on the way any recommendation set up for medium bite blue groove indoor track?
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Old 03-09-2016, 06:38 PM   #1844
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I was told to run it out of the box. Not really helpful for you but that's what I was told. Only thing to buy for it was a slipper eliminator for 17.5 class. Hopefully have mine on Thursday evening.
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Old 03-09-2016, 08:06 PM   #1845
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Quote:
Originally Posted by raved007 View Post
My Dirt version kit is on the way any recommendation set up for medium bite blue groove indoor track?
Lean on the engineers and test drivers of Xray, and start with the box stock setup... tweak from there for your individual track and driving style.
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