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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 09-16-2016, 07:18 AM   #3691
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Here is a little spring conversion i did, in case anyone is interested...

C is the Xray wgt. and the WHT is the conversion to something similar to what AE, and AVID use.

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 09-18-2016, 12:15 AM   #3692
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anyone notice the xb2 jumps very low and not very far. Sometimes when a little lift is needed I find the buggy challenging. This is usually a good thing to spend more time on the ground. However, in stock racing at times it gets tough to carry jumps after 180's or a tight corner. Was reminded this when I drove my sons b5m today. Had to be geared at 72/29 to carry a small jump in the b5m was fine at 72/31 driving the same exact lines and the Xray had faster motor both top and bottom end. Really a function of how low the xb2's jump trajectory is. Similar spring rates, pistons, etc. Added up to 3 degrees anti squat too. No measurable difference. Why is this? Thx
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Old 09-18-2016, 06:04 PM   #3693
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Watched the EOS races and it sure looks like xray has made some significant improvements in the car. With the new laydown 3 gear and the new gear diff the car was on rails and the cornering speed looked a lot better. Too bad the driver finishes were not better.
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Old 09-18-2016, 07:56 PM   #3694
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From how they update the xb4, the xb2 didn't get much. A 3 gear isn't a significant change.. still a let down with no gullwing front arms.
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Old 09-18-2016, 08:55 PM   #3695
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Hopefully the changes are just a new case and idler so we can use the 3 gear on the 16 car. Not something dumb like they made the gear diff 2 teeth bigger so it can hold more lube and the outdrives are different so you need new drive shafts. Hahaha.
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Old 09-19-2016, 07:48 AM   #3696
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Car looks the same besides the 3 gear laydown. Bent confirmed the chassis is the same so the gearbox should bolt right in the old car.
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Old 09-21-2016, 07:06 AM   #3697
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Hey Bent, on a higher grip carpet track what would be the difference (other than offset) in handling running: The XRAY wheels compared to Schumacher or Jconcepts with either:

Schumacher Mini Pins yellow / Cut Stagger yellow
or
New Jconcepts Pin Downs / Swaggers

Thanks.
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Old 09-21-2016, 07:46 AM   #3698
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Quote:
Originally Posted by dgrobe2112 View Post
Here is a little spring conversion i did, in case anyone is interested...

C is the Xray wgt. and the WHT is the conversion to something similar to what AE, and AVID use.

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
this is helpful, thanks bro
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Old 09-21-2016, 08:05 AM   #3699
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Quote:
Originally Posted by suby723 View Post
From how they update the xb4, the xb2 didn't get much. A 3 gear isn't a significant change.. still a let down with no gullwing front arms.
where are you guys seeing this new car?

EDIT: never mind I found it.

But man I'm kind of disappointing there's no update besides the 3 gear, I sold my XB2 2016 thinking there would be significant upgrade.

I'm most likely going to purchase another 2wd before the winter. While I love XRAY and will continue to run the XB4 and XB8, I may consider the B6 for 2wd.
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Last edited by lyons238; 09-21-2016 at 09:04 AM.
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Old 09-21-2016, 09:19 AM   #3700
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Quote:
Originally Posted by lyons238 View Post
where are you guys seeing this new car?

EDIT: never mind I found it.

But man I'm kind of disappointing there's no update besides the 3 gear, I sold my XB2 2016 thinking there would be significant upgrade.

I'm most likely going to purchase another 2wd before the winter. While I love XRAY and will continue to run the XB4 and XB8, I may consider the B6 for 2wd.
Take a look at EOS and wollanka's car from last weekend. I know it was carpet but it looks significantly faster than before. I dont think there was a B6 in the amain and so far i understand they are still chasing a good setup for that car. They did not show well at Nats this year.
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Old 09-21-2016, 10:11 AM   #3701
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Cragg and Haatanen finished 6th and 10th on there B6
not so bad for a team not so much represented
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Old 09-21-2016, 10:32 AM   #3702
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Quote:
Originally Posted by lyons238 View Post
where are you guys seeing this new car?

EDIT: never mind I found it.

But man I'm kind of disappointing there's no update besides the 3 gear, I sold my XB2 2016 thinking there would be significant upgrade.

I'm most likely going to purchase another 2wd before the winter. While I love XRAY and will continue to run the XB4 and XB8, I may consider the B6 for 2wd.
The new gearbox is the significant upgrade......it's so much faster through corners and so much easier to push hard on high grip.

It's truly a completely different animal on high grip with the new gearbox.

No more waiting for the weight to shift going in and out of corners, now you can just push through with so much higher corner speed

Bent
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Old 09-21-2016, 11:35 AM   #3703
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Quote:
Originally Posted by BentKa View Post
The new gearbox is the significant upgrade......it's so much faster through corners and so much easier to push hard on high grip.

It's truly a completely different animal on high grip with the new gearbox.

No more waiting for the weight to shift going in and out of corners, now you can just push through with so much higher corner speed

Bent
yeah, I had 2 Xb2's CE'sand I just couldn't get it hooked up on our high bite clay track. loved it on carpet though. not sure the 3 gear will really help with the traction issues. i know some people get them dialed, but the AE and TLR guys at my track have a much easier time getting the car dialed for clay.

i might buy another one who knows though. B6 is looking good. i would never consider any other 4wd or 1/8 car than XRAY but for some reason 2wd wouldnt matter as much to me since it's not my favorite class, so I don't necessarily want to be dumping much money into it, or spending as much time setting up.
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Old 09-21-2016, 12:05 PM   #3704
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Great news! Did you notice a significant difference in traction?
Can't wait to get it

Quote:
Originally Posted by BentKa View Post
The new gearbox is the significant upgrade......it's so much faster through corners and so much easier to push hard on high grip.

It's truly a completely different animal on high grip with the new gearbox.

No more waiting for the weight to shift going in and out of corners, now you can just push through with so much higher corner speed

Bent
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Old 09-21-2016, 12:19 PM   #3705
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Quote:
Originally Posted by JAE View Post
Great news! Did you notice a significant difference in traction?
Can't wait to get it
Traction is great. And because you carry more speed through the corner with less weight transfer you get much better drive out of the corners

It's just so much better

Bent
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