Stock suspension

[jasonsbusa]

Anyone have any advice on setting up stock suspension for drag racing? I dont know much about setting it so anything you can add is fine.

[WerxRacing]

i been to a few sites trying to  find answers. the best igo was put it to stock the go from there. depending of your highth, weight & what yor doing depends on the set up. set it up for drag track or cornring or day to day driving. a lot to think on. but getting ideas from guys will point u the right way. what i would do is not the same as u or ponky to get the same ride. u know what we all look like ;-)  .

[jasonsbusa]

How do you set it up for ugly  JK.Im just looking to drag race. Im 6'2" @ 235 lbs

[Chris Horoho]

first thing is to tighten your preload (maybe a straight link will help with tightening this up)
then adjust your compression a little snug (as you are stretched) and adjust from there (you dont want it to bottom out but you do want it to squat to transfer the traction and force to the rear wheel)
you then want the rebound fairly snug as you want it to stay squated as this keeps the force on the rear and keep traction
it takes time to get it just how you want but when set it will just feel right

[Coryonbusa]

Have you measured your sag?

[jasonsbusa]

I dont know much about suspension so can you elaberate

[DropBusa]

Pinky pretty much hit it on the head.
2 big things for drag. Low center of gravity, and the ability to transfer to the rear tire. Gotta watch the rebound too, you dont want it to spring back too much as this wont properly keep traction, thats when you risk slippage due to too much rebound. Keep in mind that you have one thing over the light weights in the rear shock is that your body weight can assist in a the bike squatting.
BUT DONT bottom it out!

[Coryonbusa]

OK. The way I do it is...
Remove the tail section and sit on your bike. Have someone measure (in millimeters) from the center of the axle bolt straight up to the last bolt hole on the subframe.
 Then, lift your back tire up off of the ground (unloading the suspension) and measure the same distance.
 Subtract the smaller from the larger and that's your "sag."

[Coryonbusa]

My sag is set to 30mm.

[DropBusa]

Sag is a measurement of travel (laden sag) or travel with rider on bike(static)that remains in the shock, due to spring.
Sag dosent have to much of an input in drag bikes. Its the corner carving bikes that you really have to focus on sag.
Remember LOW!

[DropBusa]

As for adjusting your rear shock the easiest way to do it is send a rod through the bike. (swing arm bolt) and support it with 2 floor jacks.

That way you can unload your shock.

[Coryonbusa]

When I extended my arm out +8, the rear suspension was bottoming out. When I adjusted my sag to 30mm, all of a sudden, I could launch again.

[jasonsbusa]

Mine is set from stock setting all Ive messed with is the compression and rebound.

[Coryonbusa]

Mine is set from stock setting all Ive messed with is the compression and rebound.

Stock busa's are set up for 180 lb japenesse guys!

[DropBusa]

Thought it was 140lbs jap guys??   

[jasonsbusa]

Im way off then. Now wheres my damn tool to turn the adjuster

[fatnslow]

the stock shock cant handle much, i had to add a second shock to handle my weight.










































 

[Coryonbusa]

Thought it was 140lbs jap guys??    

 

Prolly! Put my 250 lb ass on a stock busa and watch it go down about 2 inches!

Im way off then. Now wheres my damn tool to turn the adjuster

Screw driver and a hammer.  

[DropBusa]

Round about.

[jasonsbusa]

So you recommend 30mm sag then work on the compression and rebound. Im sure mine travels alot then since Im 235lbs