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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 03-25-2016, 04:04 AM   #2191
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oh

I just had a look at the manual, WTF why advertise this car as being mid and rear motor, if only the mid motor parts are included?

that sucks!
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Old 03-25-2016, 04:10 AM   #2192
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Quote:
Originally Posted by jake alton View Post
Rear motor? I didn't know the car could run the motor on the rear of the car. It is a specific mid motor car. Rear motor would need different suspension geometry. As for buyers remorse. Xb2 is again hands down one of the best buys out. Go run the car and be happy with one of the best cars out.
No, you are wrong. There is an actual rear motor option for the car as well. It's just not quite ready yet. Just look on the first page of this thread and you will see all the options for the car. Good reminder for people to look there first!

http://i745.photobucket.com/albums/x...ps6zeajzug.png
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Old 03-25-2016, 04:12 AM   #2193
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Quote:
Originally Posted by sickpuppy1 View Post
When you read about it having the motor having a mid or rear configuration, its not what you think. It is a dedicated mid motor buggy, but you have a choice of setting up the motor for mid or mid-rear as they call it. one way has the motor sitting further back by 12 mm i think. But it is still in the mid motor configuration. One is for med to med-high traction and the other is for low to med traction. Then the carpet edition is for high traction situations
Incorrect, check out the front page.
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Old 03-25-2016, 04:27 AM   #2194
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Quote:
Originally Posted by hacker View Post
oh

I just had a look at the manual, WTF why advertise this car as being mid and rear motor, if only the mid motor parts are included?

that sucks!
That was originally Xrays plans to release the rear motor options with the dirt car. Xray decided to skimp on that and just made it a mid motor only.
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Old 03-25-2016, 06:24 AM   #2195
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[YOUTUBE][/YOUTUBE]
Quote:
Originally Posted by hacker View Post
crack cocaine must be pretty easy to get

or do you need to physically see a rear motor to convince you there is a rear motor xb2?

Oh man, here we go. You were the same guys that freaked out when the t5m and the 3.0 came out with no rear motor option.

No one runs rear motor anymore, and with the stock setup on the dirt car, I doubt you need it, it has so much bite.

If you bought the carpet car, then you've really made a mistake.
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Last edited by Socket; 03-25-2016 at 06:42 AM.
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Old 03-25-2016, 07:09 AM   #2196
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Quote:
Originally Posted by hacker View Post
crack cocaine must be pretty easy to get

or do you need to physically see a rear motor to convince you there is a rear motor xb2?

Why yes it is very easy to get! Not as easy to actually get a rear motor car. And it is so much cheaper than a xb2! Thanks for the picture! I am amazed! Why not go backwards with engineering? Can't wait to run my rear motor car and take another hit off that stuff! I bet their are more people than you know that smokes that stuff!

Last edited by jake alton; 03-25-2016 at 07:19 AM.
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Old 03-25-2016, 07:34 AM   #2197
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Default Schelle slipper

So I've tried the b5m top shaft swap. Tried shimming for the odd size 5x13x5. I used a 5x13x4 with a1mm shim. Also had at least .75mm of play on Inside of tranny also shimmed that. I could not get the top shaft to rotate freely. With the slipper on and barely tight it had a bind to it. I believe in order to do this the odd ball bearing 5x13x5 will be needed.
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Old 03-25-2016, 07:35 AM   #2198
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Selfie time...

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Old 03-25-2016, 07:36 AM   #2199
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as i understand there were some design legalities with another brand on how xray wanted to do it. and couldnt use the the design they had planned. so they have to go redesign
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Old 03-25-2016, 09:42 AM   #2200
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Originally Posted by dgrobe2112 View Post
as i understand there were some design legalities with another brand on how xray wanted to do it. and couldnt use the the design they had planned. so they have to go redesign

Legalities huh? Care to point to the US patent number that would prompt legal issues? Because through my searching, I can't find a single us patent that speaks directly on motor placement in a RC car.
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Old 03-25-2016, 09:45 AM   #2201
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thats all i was told.. there was an issue with gearbox design..

"Rear motor is coming.
Originally it was going to be one gearbox for 4 gear laydown and one for 3/4 mid and rear, but due to a (car brand) patent they can't make it like first intended."
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Old 03-25-2016, 10:03 AM   #2202
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Probably Durango's patent

From: http://www.team-durango.com/race-cars/dex210/

The DEX210 is unique. That is why the gearbox design, our 'Hybrid technology,' has a pending patent (GB1112236.3). The DEX210 allows you, the racer, to choose if you want the motor to be in rear- or mid-motor position. Not only that, you can choose whether you want the motor to be on the left- or right-hand side of the car. All of these configuration options are available with the same gearbox unit and without altering the suspension geometry. This ability, to tune the weight distribution and torque orientation of the motor, without changing your suspension set-up, is what makes the DEX210 unique. The DEX210 is arguably the most tuneable yet user-friendly pro electric off road kit available today.
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Old 03-25-2016, 10:07 AM   #2203
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Quote:
Originally Posted by suby723 View Post
That was originally Xrays plans to release the rear motor options with the dirt car. Xray decided to skimp on that and just made it a mid motor only.
Disappointed, thought there was going to be a rear motor as well when i bought it. With all that's included in the carpet and the stuff that was excluded from the Dirt edition there seems to be a lot more value in the Carpet edition then in the dirt edition. Not saying one car is inferior to the other because i'm sure each was designed for their specific function but wouldn't the build costs of the dirt version be much cheaper then the carpet version. Could they of made the dirt a little cheaper then the carpet version?

Hoping it will be ok in my track since its pretty loose and no one uses mid motors.
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Old 03-25-2016, 10:29 AM   #2204
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someone asked posts back why i used the brass nose piece, it was for steering and not for jumps. for 17.5 was maybe not the right choice...weight wise

i ran the DE stock set-up with 29deg brass and 0deg insert in C-hub on a actual dirt track (only watered) Weds. the car had killer steering with no effect on rear end. the imo was good on single, double jumps, it went where i pointed it and had a onroad (which i'm used to) feel thru the course. i really liked the car.

however...the course has a quad section, and a jump to table top with a quick following triple. this is where.....I and the car failed really bad. at this track if you can't one shot the quad, and 2 step the other, u will be left behind. this part was severely aggravating

several factors play here?
- me
- car was too heavy w/brass nose (landed short)
- running a older 17.5 and old lipos (worked in previous car fine)
- charging at 6 amps (max on my charger)
- car was too soft
- was trying to figure pinion gearing for 75 spur.
- was also running a 1/8 scale e buggy, which made me marshal the heat right before 17.5, and robbed time thru the night that imo should have been on my DE.

for tomorrow i made changes to try:

Socket's 35w F, 32.5w R, 1 deg AS, 3 deg R-toe changes. on springs i will try xray 2 dot F/R. i removed the brass nose, went to stock, but going to stay with 0 deg insert in C-hub for steering.

the 1/8 buggy broke in it's 2nd place finish, so it will stay home awaiting a horizon order.
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Old 03-25-2016, 10:49 AM   #2205
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i think Durango's patent has to to do more with the unique 4-gear box design allows a rear motor placement that is farther forward than other rear motor designs the DEX was made to compete against TLR22 2.0, B4, B5, etc

motor placement in regards to it's position imo such as rear, cannot not be patented.

if xray added a rear motor guard, and a way to reverse mount their 3-gear box, imo this would not be a issue concerning patents
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