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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 02-19-2016, 09:23 PM   #1546
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Quote:
Originally Posted by gokarter64 View Post
There was an xb2 carpet edition at TRCR last sunday. Guy came down from bham after racing turf at DieHard the day before. I was impressed by the quality. Car was fast but a little edgy because of the turf setup on it. When grip gets way up I bet the carpet car would be super fast
....probably had a gear diff also. ball diff and a good setup and the carpet car will be fast at TRCR for sure.
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Old 02-20-2016, 12:18 PM   #1547
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Supposedly the dirt cars on on the boat right now. A fellow racer called and that was the answer he was given.
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Old 02-20-2016, 02:00 PM   #1548
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New alum steering arms and front mounts lookn sexy time!
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Old 02-20-2016, 04:19 PM   #1549
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i tried to put the rear shocks in the rear of the buggy, but i found when i turn hard at fast speeds it just rolls over. can anyone point me in the right direction to correct this
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Old 02-20-2016, 06:53 PM   #1550
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Default Snap ring pliers

Bent what brand of snap ring pliers are working well on the ball diff
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Old 02-20-2016, 10:32 PM   #1551
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Quote:
Originally Posted by gokarter64 View Post
There was an xb2 carpet edition at TRCR last sunday. Guy came down from bham after racing turf at DieHard the day before. I was impressed by the quality. Car was fast but a little edgy because of the turf setup on it. When grip gets way up I bet the carpet car would be super fast
Yeah, that was me. I would have liked to race it, but 1 practice pack just wasn't enough time to do much so I just raced the XB4. I'm looking forward to racing the XB2 there soon
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Old 02-21-2016, 04:10 AM   #1552
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Wink xb2

has anyone tried it on dirt ?
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Old 02-21-2016, 08:37 AM   #1553
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Ask the guy above your post. Trcr is a mid to high grip clay track. I know we have a couple yz2 buggys that appear when grip is up. Low profile transmissions only really work good when the track is super grippy. I'm sure the dirt edition xb2 will be a fantastic car, and since the carpet edition comes with more parts you could get that one and just upgrade to the 3 gear mid motor setup when the parts are released. That way you have both setup types avaliable

Last edited by gokarter64; 02-21-2016 at 09:26 AM.
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Old 02-21-2016, 10:03 AM   #1554
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I race the ce on medium tracktion dirt and works good..just needs better driver!!!
just lengthen rear camber rod to most outer holes,stops the squirrelyness..
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Old 02-21-2016, 01:35 PM   #1555
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thanks I got 1 on the way I'll get the xb4 16 and parts for the xb2 .....I'll have a xb4 15 for sale soon with a ton of parts
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Old 02-21-2016, 02:22 PM   #1556
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What other brand 12mm wheel front and rear would fit the XB2? It seems the front wheels are no where to find in the US.
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Old 02-21-2016, 02:43 PM   #1557
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i have ae wheels on my xb2. im not saying it has the same overall track width, but they do fit
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Old 02-21-2016, 03:57 PM   #1558
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Quote:
Originally Posted by rekim View Post
i tried to put the rear shocks in the rear of the buggy, but i found when i turn hard at fast speeds it just rolls over. can anyone point me in the right direction to correct this
Mine started doing that also during the mains yesterday. The rear is just so locked in. I believe less rear toe should help. I'm going to 3* and also going down on ride height.
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Old 02-21-2016, 04:29 PM   #1559
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maybe try a stiffer rear spring or adjust roll center in the rear.
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Old 02-21-2016, 05:05 PM   #1560
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Quote:
Originally Posted by Poppin Fresh View Post
What other brand 12mm wheel front and rear would fit the XB2? It seems the front wheels are no where to find in the US.
You can use Proline wheels for the AE car. To get the correct width you need to run -.75 front hexes and for the rear you can either stick with stock (3 stripe) or go up to 4 stripe rear hexes.


It is good to note that the xray wheels are a little softer so in the right situations they will help produce better traction.
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