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R/C Tech Forums Thread Wiki: Official 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 03-30-2016, 09:25 AM   #2326
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Car is ready unfortunately it started to rain so there is no chance to run it at our weds night program WXE


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Old 03-30-2016, 09:34 AM   #2327
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bring it to austin this weekend.. i got tires if you need.. gonna be a good weekend..
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Old 03-30-2016, 09:37 AM   #2328
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Thx Groby not 100% sure i can with work. I am off but i might need to stay close to work. I know theres a few of us going there this weekend

If i go ill hit you up for those tires as i only have outdoor for our track
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Old 03-30-2016, 09:39 AM   #2329
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sounds good dude.. i got some testing im gonna do this weekend.. i still waiting on parts to get my car to the dirt edition.. but still on the fence about it..
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Old 03-30-2016, 09:56 AM   #2330
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Quote:
Originally Posted by dgrobe2112 View Post
whats your gearing for the 72 spur..
Reedy Mach 3 17.5 non short stack. Geared 30x72, 60 degrees of timing. Motor was a missile. Outdoors, loose, tight track that was SUPER technical with jumps right out of turns.
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Old 03-30-2016, 10:09 AM   #2331
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That's a $55 spur gear! May just run the slipper eliminator for now and hope they come out with a stock spur. Short sighted for Xray if they perceive expansion into the US market is of importance.

Quote:
Originally Posted by WillS View Post
72 is money. Just have to put in a b5m topshaft, a bearing and run a schelle slipper.
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Old 03-30-2016, 10:19 AM   #2332
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If you have your car built I have a spare slipper eliminator in my bag along with some spare Exotek delrin spurs....
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Old 03-30-2016, 10:29 AM   #2333
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Finally got my XB2 on track this past sat. I was slower than I was previously with my B5M Lite. Changed to 3.5deg toe 1.5 deg anti squat (center in rr and .5 dot down and out on the rf, I thought at the time this would give me 3/1 but I didnt have the book with me) and it seemed to help some. I am geared at 31/75 on a 24k 17.5 with just under 60deg timing on the can, it still seemed under geared, not sure if I should go up a tooth on the pinion or try and add some more timing. Our track is med-smaller indoor packed dirt, so I would say on the low end of the traction spectrum.
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Old 03-30-2016, 11:14 AM   #2334
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Quote:
Originally Posted by JAE View Post
That's a $55 spur gear! May just run the slipper eliminator for now and hope they come out with a stock spur. Short sighted for Xray if they perceive expansion into the US market is of importance.
If a $55 slipper setup is difficult to swallow, then don't look at the replacement part cost for the Xb2....
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Old 03-30-2016, 11:16 AM   #2335
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Quote:
Originally Posted by jmcelroy42 View Post
Finally got my XB2 on track this past sat. I was slower than I was previously with my B5M Lite. Changed to 3.5deg toe 1.5 deg anti squat (center in rr and .5 dot down and out on the rf, I thought at the time this would give me 3/1 but I didnt have the book with me) and it seemed to help some. I am geared at 31/75 on a 24k 17.5 with just under 60deg timing on the can, it still seemed under geared, not sure if I should go up a tooth on the pinion or try and add some more timing. Our track is med-smaller indoor packed dirt, so I would say on the low end of the traction spectrum.
I'd try a 32, and try a 30 and see how the motor reacts feel wise. I don't have experience with the 24K unfortunately since my deal ended before they came out.
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Old 03-30-2016, 11:58 AM   #2336
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Tekin Gen3 17.5 I am geared at 72/33. This is the not the RPM version. When the new rotors come out, expect gearing to change due to the increase in power.
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Old 03-30-2016, 12:01 PM   #2337
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Quote:
Originally Posted by WillS View Post
Tekin Gen3 17.5 I am geared at 72/33. This is the not the RPM version. When the new rotors come out, expect gearing to change due to the increase in power.
You need to tell us your timing as well.
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Old 03-30-2016, 12:04 PM   #2338
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50 always 50
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Old 03-30-2016, 12:41 PM   #2339
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Quote:
Originally Posted by WillS View Post
Tekin Gen3 17.5 I am geared at 72/33. This is the not the RPM version. When the new rotors come out, expect gearing to change due to the increase in power.
what rotors are you talking about.. i have the Gen3 also..
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Old 03-30-2016, 01:11 PM   #2340
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Quote:
Originally Posted by dgrobe2112 View Post
what rotors are you talking about.. i have the Gen3 also..
This bad boy...

TT2722 12.5mm Spec Rotor Strong - YELLOW
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