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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 04-11-2016, 08:28 AM   #2551
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Default AE springs / shock oil

For the DE, which AE springs and shock oil equivalent is everyone running?
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Old 04-11-2016, 08:46 AM   #2552
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I finally picked up an XB2 CE over the weekend. I can't believe how smooth and free the tranny is. I was running a TLR 22 2.0 before and it doesn't spin nearly as free as the Xray, night and day difference.
I'll get all my electronics in it tonight and look forward to getting it on the track this weekend.
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Old 04-11-2016, 08:48 AM   #2553
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Quote:
Originally Posted by JAE View Post
For the DE, which AE springs and shock oil equivalent is everyone running?
I don't run AE shock oil - I had too many instances where from 1 bottle to another it was drastically different. After buying a bottle of 25wt that was like water, I said no more.

I do however like their shock spring selection. I'm running AE white fronts with AE white rears, AE spring cups. I recently went to 40wt front oil and 32.5 rear, Losi. The car with the 2x1.6's was blowing through the front travel on this new layout.
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Old 04-11-2016, 09:46 AM   #2554
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Default Thx

What is the AE equivalent of the losi shock oil? Thx

Quote:
Originally Posted by Socket View Post
I don't run AE shock oil - I had too many instances where from 1 bottle to another it was drastically different. After buying a bottle of 25wt that was like water, I said no more.

I do however like their shock spring selection. I'm running AE white fronts with AE white rears, AE spring cups. I recently went to 40wt front oil and 32.5 rear, Losi. The car with the 2x1.6's was blowing through the front travel on this new layout.
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Old 04-11-2016, 11:41 AM   #2555
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Quote:
Originally Posted by JAE View Post
What is the AE equivalent of the losi shock oil? Thx
http://www.rcrcr.com/index.php?optio...eral&Itemid=46

Old info. Your best bet is to stick with one brand of oil. I recommend hudy or pro spec.
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Old 04-11-2016, 11:58 AM   #2556
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prospec is the best option.. also PT fluid is good..
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Old 04-11-2016, 12:09 PM   #2557
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Quote:
Originally Posted by dgrobe2112 View Post
prospec is the best option.. also PT fluid is good..
I never had good luck with pt. Similar experience among 90% of the people I know that tried it.
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Old 04-11-2016, 12:20 PM   #2558
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Default RE: Missing Parts

I've gotta give Xray props. Sent email about missing bearing over the weekend. Xray emailed me last night (US PST), thanking me for sending picture of my receipt, and that I needed to contact hobby shop or RC America. Woke up this morning to an Email proactively from RC America, asking for my address to drop bearings in the mail right away this morning. Having bearings mailed to me at the start of the 1st business day after placing the request. Only sent 1 email. Great service.

Quote:
Originally Posted by JAE View Post
Anyone else here missing parts in their kit? My kit only came with 3 bearing s for the steering rack. Another at my track was missing a ball in the diff.
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Old 04-11-2016, 12:21 PM   #2559
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is their another ball diff that will fit in the xb2 diff cases, no luck with the stock one.
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Old 04-11-2016, 12:32 PM   #2560
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Quote:
Originally Posted by B44 View Post
is their another ball diff that will fit in the xb2 diff cases, no luck with the stock one.
What type of problems are you experiencing with the stock unit?
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Old 04-11-2016, 01:01 PM   #2561
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Quote:
Originally Posted by B44 View Post
is their another ball diff that will fit in the xb2 diff cases, no luck with the stock one.
AE will fit, but will require some work.

PM me please and tell me how much $$ shipped for your stock one.
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Old 04-11-2016, 03:19 PM   #2562
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Quote:
Originally Posted by JAE View Post
I've gotta give Xray props. Sent email about missing bearing over the weekend. Xray emailed me last night (US PST), thanking me for sending picture of my receipt, and that I needed to contact hobby shop or RC America. Woke up this morning to an Email proactively from RC America, asking for my address to drop bearings in the mail right away this morning. Having bearings mailed to me at the start of the 1st business day after placing the request. Only sent 1 email. Great service.
i had similar experience, except mine was for a washer or something. i ended up finding one that fit in my parts bin, but i had a response almost right away
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Old 04-11-2016, 03:19 PM   #2563
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Quote:
Originally Posted by Customworksking View Post
Okay guys I been with xray over 10yrs I can't get both of my diff's "bought 2 ball diffs" set without them soo tight they're like a spool it's crazy how tight it is and yes I even glued the diff rings because my 1st diff rings did slip... I can't drive the car hard at all other mid motor cars pull wheelies I will spin out going str8 ..... it's a diff issue not setup i tried every setting I can with zero luck
Did they work first time out of the packet?

After you pulled them apart and cleaned them, is that when they started to feel tight?
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Last edited by Boz; 04-11-2016 at 04:49 PM.
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Old 04-11-2016, 03:23 PM   #2564
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Probably had the same problem I had; lubed diff with a dry thrust assembly.
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Old 04-11-2016, 03:27 PM   #2565
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Quote:
Originally Posted by JAE View Post
In my b5m I run a reedy 17.5 at 42 degrees timing 72/32. Thing is fast! 12 minutes on med size tight track with a 70 foot straight coming off at 125 after 8 minute. Ran for 13 mins yesterday came off at 135. Have a new souprd up fantom haven't installed yet because the reedy is so fast for a 90$ motor

The straight at SCVRC is 95' not 70
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