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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 04-15-2016, 06:56 PM   #2701
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I just got a xb2 and xb4
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Old 04-15-2016, 07:03 PM   #2702
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Quote:
Originally Posted by lyons238 View Post
I just got a xb2 and xb4
Very nice. Both are incredible cars with great support. Enjoy!
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Old 04-15-2016, 07:11 PM   #2703
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Quote:
Originally Posted by lyons238 View Post
I just got a xb2 and xb4
Lucky you.

Fix your signature up. We don't want see that TLR stuff no more.
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Old 04-15-2016, 07:23 PM   #2704
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Quote:
Originally Posted by B00t13g View Post
Very nice. Both are incredible cars with great support. Enjoy!
Thank you! I'm loving the look of them! I just have to build them. I'm trying to decide to build my xb4 as the kit setup or use medium composite side guards and braces? i will be running on both clay and carpet.

My XB2 will be run strictly on carpet.

Quote:
Originally Posted by Boz View Post
Lucky you.

Fix your signature up. We don't want see that TLR stuff no more.
There we are
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Old 04-16-2016, 03:58 AM   #2705
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Quote:
Originally Posted by ogmudbum View Post
Does bezerk usually make some high quality stuff?
Paul at Beserk does amazing work. I gave him my chassis a couple of days ago and this was the result.

Hopefully it will give a lot more flex and for the guys putting their cars on diets, it will shed a few grams!!!
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Old 04-16-2016, 08:36 AM   #2706
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The chassis looks stellar, I'd love to try it with the hard chassis braces, or some sort of top deck. The DE seems to have a boat load of flex built in. So much so, I'd like to start trying the CE hard parts to see their effect.
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Old 04-16-2016, 03:35 PM   #2707
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I remember seeing pictures...heck it may even be on the first page of this thread...of prototype chassis' made from CF and from composite injection molded material. They settled on the aluminum chassis for the production kits. I am sure there are certain conditions where one might be better than another.
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Old 04-16-2016, 05:19 PM   #2708
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Quote:
Originally Posted by Socket View Post
If I were wanting to fit a fan, which I will be soon...

I'd copy Matt's setup here.

Official Team Associated RC10 B5m Mid-Motor Thread

The mount can be purchased here...

http://www.discountrcstore.com/Schum...F2-p/u4696.htm

Remember, I tape my battery in.
I'm liking the look of this. Not sure what fans will fit or if that will work on an xb2.
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Old 04-16-2016, 05:36 PM   #2709
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Originally Posted by B00t13g View Post
I'm liking the look of this. Not sure what fans will fit or if that will work on an xb2.
I still haven't gotten out the dremel and made the full commitment yet. I'm getting ready to do a battery change (taped in...) and plan on fabbing a mount then. The XB2 DE body provides very little room for a fan.
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Old 04-16-2016, 09:46 PM   #2710
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took a shot of a racer's brand new yokomo dirt edition, it's rear carrier lobes are .5 to 1 mil up in the back from the bottom of the chassis.

this is what xray should have done.
Attached Thumbnails
Official Xray XB2 2WD Buggy Thread-yx2-de.jpg  

Last edited by fast-ho-cars; 04-17-2016 at 10:23 AM.
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Old 04-16-2016, 11:50 PM   #2711
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I was at the JBRL race in San Diego tonite and looked at 2 new Yokomo 4 wheelers, and the have factory shims spacing them up....
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Old 04-16-2016, 11:52 PM   #2712
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Quote:
Originally Posted by avaldes View Post
I remember seeing pictures...heck it may even be on the first page of this thread...of prototype chassis' made from CF and from composite injection molded material. They settled on the aluminum chassis for the production kits. I am sure there are certain conditions where one might be better than another.
Still have the CF and composite chassis from testing last year

They were ran with different composite and CF chassis side guards.

The composite chassis never became a favorite to any of the team drivers.

Malin liked the CF chassis though on certain clay and dirt tracks as well as on a couple of lower grip astro tracks.

But as an overall chassis the aluminum was an easy choice

Bent
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Old 04-17-2016, 12:04 AM   #2713
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Quote:
Originally Posted by Rc4life1978 View Post
Has anyone got anything to say about the dirt edition version ??? Is it amazing or just make the carpet one work on loose dirt

Dirt Edition is much better on loose dirt.

For clay and medium bite dirt and astro (wet) we mostly run the 3 gear.

On loose dirt we run the optional 4 gear setup as it creates more grip due to motor rotation and front to rear weight transfer.

On loose and bumpy tracks we also add 2-4 mm of rear droop to gain rear traction off power and better bump handling.

You can either buy the optional 4-gear gearbox or drill out the stock 3-gear gearbox of the Dirt Edition.

Conversion list for CE and DE:




You will need the extra idler gear with shaft and bearings and either buy the 4-gear gearbox or drill out the stock DE 3-gear gearbox.



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Old 04-17-2016, 08:35 AM   #2714
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when is the rear motor stuff expected
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Old 04-17-2016, 10:18 AM   #2715
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according to the photos xray provided on rear motor config option on this car, we would need a motor guard with rear carrier integration to mount it and items for battery mount changes.
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