Wheelbase/gearing..

[Billy the kid]

If i want to push the rear wheel closer to the bike to shorten the wheelbase the chain will be loose.

So the chain has to cut...but the distance the wheel has been moved front isn't equal to the chain links that need to be removed to cut the slack,it is shorter.

Can this be fixed by a smaller front spocket??Or a bigger rear spocket???

[BUSGO]

I found that with new sprockets and chain that by removing one set of links only the rear axle came right up against the swingarm which made the chain too tight.
If you run a new chain for a couple of thousand ks before removing the link, it allows just that fraction extra stretch that you need to be able to fit it.
Dropping either sprocket by one tooth should allow the new chain to be shortened one link and fit ok. I don't suggest you reduce the front sprocket though, it puts extra strain on the chain.
I suggest you reduce the rear by 1 or 2 teeth or take the first option if you haven't already shortened the chain. (I'm guessing that you have).

[GRUNTMAX]

Dropped my rear sprocket 1 tooth. The poor man's no hassle way of fitting a high ratio 5th & 6th gear in the gearbox.
Shortening the wheelbase, you must be building a stunt bike for a large size DAREDEVIL DURKINS GLOBE OF DEATH.

[BUSGO]

Shortening the chain is supposed to make the GEN 1 busa handle better.
I didn't notice any concievable difference after doing it.
I learnt to corner better.

[Billy the kid]

Shortening the chain is supposed to make the GEN 1 busa handle better.
I didn't notice any concievable difference after doing it.
I learnt to corner better.

Yeah thats what i'm thinking also!!I found out that i need to make my braking on the long straight if the track i go in better.Thats where all the 1000cc guys pass me..
And that ain't no wheelbase problem!

[jzbusa]

I recently replaced my chain & sprockets, std gearing, and was able to loose a link - rear wheel adjustment is right at the minimum or shortest wheelbase and the chain adjustment was ok. Ive got 1 inch raised dog bones & when i swapped back to std dog bones just last week i found the chain way too tight. Cant move the rear wheel any closer as there is no adjustment left so the raised dog bones went back in.

So with a shorter wheelbase & a raised rear ride height it turns pretty good, maybe this is what your after ?

hope this helps jz

[jessie928]

i went up a couple of teeth in the rear sprocket, and then took some alloy of of the slot aswell to make the wheelbase even shorter.

it becomes a different bike! i highly reccomend it!

get ready for even more wheel in the air action though!

Jes

[Billy the kid]

It is a tricky mod since when you push the wheel front the rake/trail increases.That is because the rear wheel goes up sliding on the swingarm.
It is a small amount but it takes alot of measuring to keep the rake trail the same after moving the rear wheel front...

I think i might combine a 55 rear,60 front tyres profile and then go for dog bones.Thansk people!

[Maj]

I recently replaced my chain & sprockets, std gearing, and was able to loose a link - rear wheel adjustment is right at the minimum or shortest wheelbase and the chain adjustment was ok. Ive got 1 inch raised dog bones & when i swapped back to std dog bones just last week i found the chain way too tight. Cant move the rear wheel any closer as there is no adjustment left so the raised dog bones went back in.

So with a shorter wheelbase & a raised rear ride height it turns pretty good, maybe this is what your after ?

hope this helps jz

What does your chain do if you bottom the suspension, i have heard of guys breaking and bending the output shaft from a pothole with the chain tightening through the suspension range

[Billy the kid]

I recently replaced my chain & sprockets, std gearing, and was able to loose a link - rear wheel adjustment is right at the minimum or shortest wheelbase and the chain adjustment was ok. Ive got 1 inch raised dog bones & when i swapped back to std dog bones just last week i found the chain way too tight. Cant move the rear wheel any closer as there is no adjustment left so the raised dog bones went back in.

So with a shorter wheelbase & a raised rear ride height it turns pretty good, maybe this is what your after ?

hope this helps jz

What does your chain do if you bottom the suspension, i have heard of guys breaking and bending the output shaft from a pothole with the chain tightening through the suspension range

True!