Rear wheel spacing.

[pauldeepsea]

If anyone has formula for setting up axle spacers for first time I would appreciate a copy or any advice

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This is not exactly a formula but this is what we did when making custom spacers for my aftermarket wheels..
1st measure the total width of the inside diameter of the swing arm
Then measure the width of the wheel hub to hub, you will also have to take in account the width of your rear brake caliper bracket and subtract Both the hub width and the brake caliper mount width. This will give you the size of the 3 spacers.
Or you can call Derrick and Donna and Order the stock pit bull spacers to make it easy

 

[pauldeepsea]

Have a 2002 pitbull, that I bought last year w 5000 on it. Since I bought it the belt would go up again tire when backing up and would travel back n forth on front pully on hwy. Could never get to track center both ways.

After primary noise tore done n replace compensator n used 8 foot lights to center rear wheel to front...

Then checked with squares n level. All mounts, engine, trans and axle are ,+- .010 at worst.

Then w true rear wheel built trans adjusters off rear peg mounts so could push either side to true trans w wheel..

Problem is trans is the engine has no adjustment and is mounted to trans by primary..so basically the only adjustment is rear wheel...since trans is dictated by engine n primary.

That's fucked up for obvious reasons..
It "appears" that the rear axle is properly spaced but who knows ..unable to find formula BD used to set up spacers or any other specs. Belt has always found home on shifter side if front pully.

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Let’s start with the transmission to motor alignment,
As others have stated align the transmission, motor and primary,
You stated that there is no adjustment to align this and I understand the way the frame is Setup there isn’t much room for adjustment forward or back but it’s critical to getting it aligned to the primary, there is also a method to torquing the bolts, unfortunately I can’t remember if it’s the transmission 1st I have it in my notes from my big bear build. 2nd there is also a vertical alignment with the transmission which requires a check with a feeler gage. Again somewhere in my notes but it requires shims if not within the tolerance. I will check for my notes.
Let’s focus on what going on with the rear,
Do you have a spacer in between the hub and the rear sprocket ? I can take a picture of what it looks like from my pit bull if you need or if you want I can pm you my number and I will do my best to walk you through it, I am a novice at best but have torn and rebuilt a few and willing to help if I can

 

[pauldeepsea]

This is the spacer I am refereeing too

 

[Patrick]

Was not one on mine but I put a .060 on

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[Patrick]

Here is what I got going on...

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[Patrick]

The space actually makes it worse by moving belt wrong way

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[Patrick]

I have messaged donna to see what was used. Thanks

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[pauldeepsea]

Dumb question?
Are the spacers facing the right way ?
As in bearing relief towards the bearing side ?
When you say not on mine but I put a .060 on ?
Where is this measurement coming from ?
I had an 04 pitbull, which is why I ask

 

[Patrick]

The spacers w the step both face bearings..
Was NO space on my bull but I though like u that moving pully out may help..so I bought one that is 65 thousands but since belt was already tracking towards outside on LH drive it just aggravated situation...another reader had same issue n replaced pully n belt and all was well...

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[Patrick]

Will do complete tear down in December so may just run it but man I don't like how loose my rear end feels...may be I'm just not used to a 250 tire and its lack of tracking but something just dont feel right
New wheel bearings ...also..have some run out in rim also from detroit manhole in middle of interstate 7 inches high.
.on new hwy

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[pauldeepsea]

Well from what I see your belt is tracking fine on the pulley , if it’s rubbing your tire I guarantee your axle adjustment is off!
Laser etc... they are off... could be the “eggs” ovals in the axle are facing wrong !!!

 

[Patrick]

Will look at them but think they only go on one way

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