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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 04-18-2016, 11:35 AM   #2746
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I measured stock hexes on the rear with JC b5m rear wheels, and the car had the same track width as the stock xray wheels.

Fast_Ho_cars was there when we measured. I haven't checked the front, yet.
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Old 04-18-2016, 05:45 PM   #2747
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you need the -.75 fronts with AE wheels
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Old 04-18-2016, 08:01 PM   #2748
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Quote:
Originally Posted by Socket View Post
I measured stock hexes on the rear with JC b5m rear wheels, and the car had the same track width as the stock xray wheels.

Fast_Ho_cars was there when we measured. I haven't checked the front, yet.
So you mean to tell me, that all the pre mounted B5M tires I had could have been put to good use on my race day weekend? Smh
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Old 04-18-2016, 08:26 PM   #2749
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Quote:
Originally Posted by Poppin Fresh View Post
So you mean to tell me, that all the pre mounted B5M tires I had could have been put to good use on my race day weekend? Smh
I have learned to take anything on the internet, no matter how reliable it may be, and treat it with a heavy dose of skepticism.

I advise others to do so as well with my posts..

I can't comment on the fronts, but regardless of how many times you tell me to waste $10 on front wheel hexes, I will measure them.

If it's only 1mm wider...I have a belt sander that can lop 1mm off the front hex in 2 seconds
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Old 04-18-2016, 11:00 PM   #2750
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Does anyone run a gear cover on the CE edition? It seems a little hard to keep the body from rubbing on the spur at first blush....
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Old 04-18-2016, 11:07 PM   #2751
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Quote:
Originally Posted by 13Maschine View Post
Does anyone run a gear cover on the CE edition? It seems a little hard to keep the body from rubbing on the spur at first blush....
Not that I'm aware of. I made the hole on the body larger for the top shaft, which cured any rubbing issues I had.
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Old 04-19-2016, 02:32 AM   #2752
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Built my first Xray buggy last night, minus the shocks, and was very happy with how things went. I have plenty of experience with the onroad stuff from Xray, but pleased to see the quality is just as exceptional on this side of the house. Been reading & learning a lot in this thread the past 2-3 weeks, so thanks to everyone for sharing your knowledge & experiences. Really looking forward to playing in the dirt soon
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Old 04-19-2016, 09:03 AM   #2753
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Default Carpet vs Dirt

Now that folks have had the chance to run both, what's the consensus on med/high bite indoor clay? Is the Carpet much like what is said about the YZ2? Difficult to get setup and dirt is better?
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Old 04-19-2016, 09:54 AM   #2754
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i will say i was skeptical.. but the dirt edition is faster on medium to high bite clay.. by 0.3 sofar.. and thats with little testing.. just minor changes from stock setup.. i have worked with the carpet edition since it came out.. and get to a certain speed.. and cant get it past a certain lap time.. without making the car unpredictable..
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Old 04-19-2016, 10:14 AM   #2755
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on medium to high bite clay consistency is more of a concern than speed. The dirt edition maintains a more consistent lap to lap time than the carpet edition. If you run on a surface that has a big groove or is well prepped on a race to race basis, you might be able to run the carpet car. I would say the ideal car for the average user would be the dirt edition.
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Old 04-19-2016, 11:22 AM   #2756
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Thanks for the replies! I am putting together a dirt edition, and saw someone selling a carpet. Thought about having 2. Potentially running 1 at a local higher bite, tight, clay track. But, looks like there would be little, if nothing, gained. There is no astro or carpet near me. thx
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Old 04-19-2016, 01:33 PM   #2757
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Quote:
Originally Posted by dgrobe2112 View Post
here is my setup sheet from this past weekend.. winning setup.

http://forum.teamxray.com/xform/inde...setup=xb2_2016
Stupid question but was this the CE on med to high bite clay if so can you send it to my email please ??? To [email protected]
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Old 04-19-2016, 01:35 PM   #2758
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no.. i converted mine to DE.. i still have my recent setup for the CE on the same track.. medium to high grip clay..

but i did send you the most recent carpet edition setup i used.
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Old 04-19-2016, 03:04 PM   #2759
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Has anyone tried kyosho shocks yet?
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Old 04-19-2016, 03:15 PM   #2760
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Quote:
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Has anyone tried kyosho shocks yet?
shocks or springs?

Springs, yes. Use AE spring cups.

Shocks? Nope..no reason to.
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