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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 01-29-2016, 06:18 AM   #1201
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Quote:
Originally Posted by UK.hardcore View Post
He does have a capacitor bank in there, its the thing with 4 round objects covered in black shrink wrap.
Ok thanks. Mine looks much different
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Old 01-29-2016, 06:32 AM   #1202
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Hey guys, im looking for some help, my track when warm is very high bite but it has cooled a good bit and can be in the 40s at night. With that said, when the track is in the 40s mu car has much less rear grip, i've tried everything from adding up to 6 deg of rear toe lol to adding a bunch of front droop. I cant get the rear to hook up on exit. The way I see it is that i need to add a bunch of rear weight or wait for the DE gearbox. Dont get me wrong, when the grip is up the car hooks up very well but now that its cool Im struggling to be competitive against the dirt style mid motor cars...
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Old 01-29-2016, 08:44 AM   #1203
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I usually move the hubs forward in those scenarios .. tried that yet?
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Old 01-29-2016, 08:56 AM   #1204
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Quote:
Originally Posted by goehm View Post
I usually move the hubs forward in those scenarios .. tried that yet?
I have, it helps but not nearly enough... cant wait for the DE parts. I have the shock mounted on the rear of the towers, inner most hole on a arms and zero anti squat.
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Old 01-29-2016, 10:48 AM   #1205
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Quote:
Originally Posted by Norse View Post
Thanks for the info my friend. I assumed that it would run good with the medium flex parts and incorporating the ball diff makes tons of sense.
Asking as I am getting impatient waiting for the dirt edition, thus thinking about picking up the carpet edition. Tune it best I can for lower bite conditions and eventually grab the dirt edition motor mount and gear box.

Thanks again
Your are welcome. You will not be disappointed with the carpet version. Good luck and let us know how it goes.
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Old 01-29-2016, 05:22 PM   #1206
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Originally Posted by suby723 View Post
Stock shocks but yatabe springs. Yellow front green rear.
Suby723 - So your running Yatabe springs? I bought some and they were shorter than the factory XRAY 1 dot's. Did you too find that to be the case?



Thanks!
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Old 01-29-2016, 06:05 PM   #1207
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Originally Posted by Donkeyworx View Post
Suby723 - So your running Yatabe springs? I bought some and they were shorter than the factory XRAY 1 dot's. Did you too find that to be the case?



Thanks!
Yep they are shorter but had no issues getting 16-17mm ride height. They work great on the car but I think they may be a tad to stiff on the stock car that is only 1475grams. I can't wait to add some weight on the car just waiting for the weights to be released. I am currently running a setup very similar to Marlins eos hudy arena setup. My local carpet track is high bite.
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Old 01-30-2016, 03:13 AM   #1208
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Quote:
Originally Posted by suby723 View Post
Yep they are shorter but had no issues getting 16-17mm ride height. They work great on the car but I think they may be a tad to stiff on the stock car that is only 1475grams. I can't wait to add some weight on the car just waiting for the weights to be released. I am currently running a setup very similar to Marlins eos hudy arena setup. My local carpet track is high bite.
I'm waiting on that brass front bulkhead!
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Old 01-30-2016, 06:27 AM   #1209
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Originally Posted by fivepointnine View Post
I'm waiting on that brass front bulkhead!
Yeah I need the bulkhead and battery tray weight ASAP!
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Old 01-30-2016, 06:28 AM   #1210
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I spy a chassis stiffener. Now keep in mind that the hudy arena has crazy high traction.
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Old 01-30-2016, 10:31 AM   #1211
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is there a tire recommended for blacktop? these are the tires i got in blue
http://www.amainhobbies.com/rc-cars-...361563?v=27300

but i am sliding quite a bit.
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Old 01-30-2016, 03:29 PM   #1212
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Originally Posted by symmetricon View Post
I have, it helps but not nearly enough... cant wait for the DE parts. I have the shock mounted on the rear of the towers, inner most hole on a arms and zero anti squat.
Quick question on this. The XB2 features page says mount on front of towers for low traction. Is this not the case and is testing showing mounting on the rear gives more rear overall traction?

Thanks
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Old 01-30-2016, 09:06 PM   #1213
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Quick question on this. The XB2 features page says mount on front of towers for low traction. Is this not the case and is testing showing mounting on the rear gives more rear overall traction?

Thanks
I mounted the shocked on the back to get as much weight back as possible.

Invaded my car today, I rebuilt may ball diff and glued up some aka slicks and my car was soooo much better. We raced reedy style head up racing today and I took a 1, 2 and 3. The car was excellent.
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Old 01-30-2016, 09:09 PM   #1214
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https://youtu.be/yFHmATE8HsA



The fourth run of the day, mine is the white car you hear the race directory talking about at the start. I started 7th and finished 3rd, had a good change at a 2nd finish but made to many mistakes. ..

Overall I took second
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Old 01-30-2016, 09:55 PM   #1215
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What's the recommended gearing for a 13.5 with a 81 spur. Medium to large track
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