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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 08-31-2016, 01:38 AM   #3601
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so has anybody installed a 69/30 spur/pinion in their Xb2 Carpet Edition?
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Old 08-31-2016, 02:29 AM   #3602
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Xray Graphite Chassis. Xray Version - Anyone used it yet and does it have more flex than the stock? thx
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Old 08-31-2016, 06:35 AM   #3603
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Quote:
Originally Posted by JAE View Post
Xray Graphite Chassis. Xray Version - Anyone used it yet and does it have more flex than the stock? thx
Yes it has.

We use it on low to medium grip dirt and wet astro with 3 and 4 gear mid layout.

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Old 08-31-2016, 10:49 AM   #3604
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Quote:
Originally Posted by Phillip F View Post
so has anybody installed a 69/30 spur/pinion in their Xb2 Carpet Edition?
i have not used a 30.. i have used a 32, i think 31 is the smallest you could go with the CE.. i can check tonight if you need me to
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Old 08-31-2016, 10:56 AM   #3605
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31 barely fit for me, but was worried about long term effects on loose gear mesh. Best to just use 72, and if looking for a drive ratio accomplished with a 69tooth just to buy a 75 tooth to get close to what the 69 offers.
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Old 08-31-2016, 10:59 AM   #3606
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Bent, thank you. I don't want to have to continually take the chassis on an off. Does running the hard side pods, and screwing on all screws in the waterfall bring the chassis back close to stock flex? Trying mostly for more grip so need more flex, but occasionally run high bite and would like a quick fix to tighten the buggy up. Your comments on this thread are much appreciated, and I think I speak for all. thx

Quote:
Originally Posted by BentKa View Post
Yes it has.

We use it on low to medium grip dirt and wet astro with 3 and 4 gear mid layout.

Bent
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Old 08-31-2016, 11:01 AM   #3607
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31 barely fit for me, but was worried about long term effects on loose gear mesh. Best to just use 72, and if looking for a drive ratio accomplished with a 69tooth just to buy a 75 tooth to get close to what the 69 offers.
with the 72 spur... can you use a 30T or 29T pinion in the CE?
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Old 08-31-2016, 11:04 AM   #3608
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yes, 29 was smalllest i tried. barely fit
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Old 08-31-2016, 06:54 PM   #3609
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Quote:
Originally Posted by JAE View Post
yes, 29 was smalllest i tried. barely fit
You mean mesh is loose with a 72/29 for the CE?

How about the DE can you fit a 69/30 gear in there?
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Old 08-31-2016, 09:41 PM   #3610
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69/32 smallest on the de..
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Old 09-01-2016, 01:23 AM   #3611
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I've heard a lot of opinions from yz2 owners claiming the Yokomo was similar to an Xray with more steering. I'm curious to hear from XRAY owner that have driven both. What are the differences in both the carpet and dirt car in relation to the Xray? I have 3 X-rays, so am thinking of trying one out to mix it up a bit. But, may not want to if they drive the same. I drive on high bite and med bite clay. Thx
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Old 09-01-2016, 02:00 AM   #3612
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Quote:
Originally Posted by JAE View Post
I've heard a lot of opinions from yz2 owners claiming the Yokomo was similar to an Xray with more steering. I'm curious to hear from XRAY owner that have driven both. What are the differences in both the carpet and dirt car in relation to the Xray? I have 3 X-rays, so am thinking of trying one out to mix it up a bit. But, may not want to if they drive the same. I drive on high bite and med bite clay. Thx
get an 1/8 scale ..that will really mix it up.
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Old 09-01-2016, 08:23 AM   #3613
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XB2 DE FEELER
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Old 09-01-2016, 11:27 PM   #3614
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Anyone figure out how to get the buggy or not push a bit on power mid to corner exit? I'm running the carpet car on super high bite clay (slicks 100% of time) and it also pushes a bit on medium/high bite (electrons). Pistons are 2 hole 1.6 & 1.7 schelle Pistons with 32.5/ 30 oil. Springs are 2 dot front 2 dot rear. 2mm front limiters none in rear. Shocks on rear with brass hangers (keep on for when I'm on medium bite track).

Tried associated gray fronts seemed to help a bit. Turn in is fine, just mid turn and on exit. Ive seemed to notice this more since the b6 came out, and all the buggies I'm racing against seem to corner much better than when they were all b5m's on the track. In any event, is this symptomatic of the xb2 and is there a common way with this buggy to tune it out? Thx
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Old 09-02-2016, 01:15 AM   #3615
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I'll have mine at OCRC this Saturday. I just went from AE grey to AE white front and I got a lot more steering all the through but that was at SCVRC so we'll have to see how it feels at OCRC. I have kyosho white rear. Can't remember the rest, but anyway, see you Saturday if you can make it.
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