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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 09-27-2016, 11:07 AM   #3751
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it just cracked? no wrecks? no bad landings? just cracked?
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Old 09-27-2016, 11:41 AM   #3752
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Quote:
Originally Posted by raved007 View Post
I have same problem xb2 and xb4 running with stock piston i know xray shocks is sucks not like losi, kyosho shocks. I only race in one day then my oil shocks was very dark.
You also have a problem with the shock coating? I think most drivers may not notice the same problems, because they do not attentively serviced car. While such damage is affecting the behavior of the car and its competitiveness.

Quote:
Originally Posted by BentKa View Post
Never seen this before on any Xray shocks, but as some have noted it looks almost like the coating inside is coming off.

I can see this being a possible outcome of running "oversized" machined pistons. Unlike machined pistons which are usually very square with sharp edges the stock pistons are slightly rounded. Hypothetically the machined pistons could damage the inner coating in case of a crash where force is applied to the shock shaft sideways pressing the piston against the inner sidewall of the shock. The combination of very small tolerances, sharp edges of the piston, slightly worn shock guides and excessive force sideways could possibly cause this.

You say you are running the Schelle pistons which I have no personal experience with so I can't comment on the design or outer diameter of them specifically though.

But as mentioned I've never seen this happen to any Xray shocks we have built or used over the years but then again we only run the stock Xray pistons drilled to various hole configurations.

I don't know......maybe buy new rear shock bodies and run the stock pistons to see ?

Kit comes with blanks that you can drill to any configuration you want (like we do).

Bent
At the same time two rear shock body equally erased coating. Shock shafts are not bent, he had no crashs, and this happened in a very short time. We think that this is a problem with the quality of the coating of new shocks bodies, because he used black shock body (XB4) with these pistons for 3 years and all was well. This is not problem with pistons.
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Old 09-27-2016, 01:09 PM   #3753
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Quote:
Originally Posted by Laverychev_Max View Post
You also have a problem with the shock coating? I think most drivers may not notice the same problems, because they do not attentively serviced car. While such damage is affecting the behavior of the car and its competitiveness.



At the same time two rear shock body equally erased coating. Shock shafts are not bent, he had no crashs, and this happened in a very short time. We think that this is a problem with the quality of the coating of new shocks bodies, because he used black shock body (XB4) with these pistons for 3 years and all was well. This is not problem with pistons.
How can you say with 100% certainty that the problem can't be related to the pistons he's been using ?

You say everything else is 100% perfect with no crashes or any damage and yet the only thing that is different compared to a stock setup is the pistons.......

So the only thing that differs from the drivers having no problems with this is the pistons he uses.

Not saying it has to be this but..........

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Old 09-27-2016, 01:19 PM   #3754
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Quote:
Originally Posted by dgrobe2112 View Post
it just cracked? no wrecks? no bad landings? just cracked?
Same bad landings as my AE wheels. I always run both my CE and DE. The CE can only take AE rims and the DE will only take xray rims. First time ever happened to me... Usually.. I strip rims due to over tightening ... Never cracked wheels.
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Old 09-27-2016, 02:22 PM   #3755
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Quote:
Originally Posted by Phillip F View Post
Same bad landings as my AE wheels. I always run both my CE and DE. The CE can only take AE rims and the DE will only take xray rims. First time ever happened to me... Usually.. I strip rims due to over tightening ... Never cracked wheels.
Has it only happened once? multiple times? only once is an anomoly......weak point in the extrusion/mold injection. It happens.....
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Old 09-27-2016, 02:33 PM   #3756
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Quote:
Originally Posted by BentKa View Post
How can you say with 100% certainty that the problem can't be related to the pistons he's been using ?
I made this conclusion from the fact that these pistons he used 3 years (won two national titles and many-many races), took part in many competitions (indoor, outdoor) and had not problems with these pistons with black shocks bodies. He puts the same (not similar, namely those) pistons in the new XB2 (with updated shocks bodies) and after a couple of training sessions and one race the coating erased.
At this moment, he put his old shocks bodies (from XB4'15) into XB2 and held a training session with them. Everything was ok and no problems!
What do you think, where is the problem?
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Old 09-27-2016, 02:44 PM   #3757
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Quote:
Originally Posted by Laverychev_Max View Post
I made this conclusion from the fact that these pistons he used 3 years (won two national titles and many-many races), took part in many competitions (indoor, outdoor) and had not problems with these pistons with black shocks bodies. He puts the same (not similar, namely those) pistons in the new XB2 (with updated shocks bodies) and after a couple of training sessions and one race the coating erased.
At this moment, he put his old shocks bodies (from XB4'15) into XB2 and held a training session with them. Everything was ok and no problems!
What do you think, where is the problem?
Well......after working in the automotive sector for my entire life and building/racing R/C cars since -79 I would say I would start with what differs from a standard setup that is commonly used by other owners without issues.

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Old 09-27-2016, 03:21 PM   #3758
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OK, thank you Bent for your answer and help for XRay drivers!
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Old 09-27-2016, 03:38 PM   #3759
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Quote:
Originally Posted by Laverychev_Max View Post
OK, thank you Bent for your answer and help for XRay drivers!
You're very welcome

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Old 09-27-2016, 04:59 PM   #3760
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Quote:
Originally Posted by cyclebrkr View Post
Has it only happened once? multiple times? only once is an anomoly......weak point in the extrusion/mold injection. It happens.....
so far ... only one of the rear wheel. Sucks because the tires are just 3 days practice old.

Last edited by Phillip F; 09-27-2016 at 11:17 PM.
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Old 09-28-2016, 06:54 AM   #3761
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Will the new 3 gear laydown transmission have a new or revised gear diff.
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Old 09-28-2016, 06:56 PM   #3762
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Quote:
Originally Posted by BentKa View Post
Well......after working in the automotive sector for my entire life and building/racing R/C cars since -79 I would say I would start with what differs from a standard setup that is commonly used by other owners without issues.

Bent
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Old 09-28-2016, 06:57 PM   #3763
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Bent,

Can you tell us the parts needed for the 3 gear laydown trans switch?
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Old 09-30-2016, 04:42 PM   #3764
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So I have the possibility of a kick ass deal (below dealer cost) on a 2016 XB2 Dirt edition that was opened, but unbuilt or used. Should I go for it, or will the new model be different enough to wait and go full price mode? If it's only a few new parts, i'd much rather only spend the on the kit I can get now. I already have a laydown 22 3.0 that is perfect for me to run on high/medium grip clay tracks, so I wouldnt be converting this to a laydown car.
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Old 10-03-2016, 12:47 AM   #3765
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so is this the 30T pinion that works with the new Xray slipper eliminator?
https://www.amainhobbies.com/xray-al...54546?v=150275
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