GS1000 front sprocket max ofset

[Reinhoud]

I'm busy rebuilding my GS1000, I've got a rear wheel of a GSXR1000 K8, 6'' - So the front sprocket needs to come out another 5mm.

Now I was wondering, how far can I go out before I start ruining stuff/bearings?

 

Thanks

 

 

 

 

[TonyGee]

I can't see an extra 5mm making any difference to the bearings !!!!  but have you got enough room at the frame pivot area ? 

[jb]

I’ll double check on mine when I get home but I think it’s around 3/8” before the chain starts hitting the frame…..I’ve also had to use a non o-ring 530 chain (slimmer than the standard o-ring type).

[Reinhoud]

I have to be creative with the frame.

I already have a plan

 

I was busy aligning the chain, and I noticed it has to come out a bit, almost at the end of the shaft

[TonyGee]

6 hours ago, Reinhoud said:

I have to be creative with the frame.

I already have a plan

 

I was busy aligning the chain, and I noticed it has to come out a bit, almost at the end of the shaft

this is what happens when you get greedy with your 6inches  I'm happy with my 5.5inches   

[Reinhoud]

19 hours ago, TonyGee said:

this is what happens when you get greedy with your 6inches  I'm happy with my 5.5inches   

I ordered a GSXR wheel to match the front wheel, didn't know it was wider.. Looks a bit better, apparently every centimeter counts

[coombehouse]

If you measure everything, I don't believe there is enough room to run a 6 inch rim on centre without doing something to the frame in the pivot area to gain clearance. 

[rodneya]

A K8 750 or 600 wheel should be 5.5"

[Dezza]

A 170 tyre will also go on a 5.5 rim, which will make things easier.

[Bav]

I am probably wrong on this, but thought I would add it just in case, but years ago I had an EFE and used (I think?) a Gpz750 front sprocket, which was offset from the factory. But a hefty 630 fitting. I am sure that I heard/read somewhere that some Kwaks have offset front sprockets? ZZR1100?? I don't know enough about the pitch sizes but could an offset (Gpz750) sprocket be machined down to a more user friendly 530? I admit that I am stupid in not knowing the sizes of the chain pitch. If my 5 year old grandson was here he would no doubt be able to tell me. 

[Captain Chaos]

630 means 6/8" pitch, 3/8" width.

530 means 5/8" pitch and 3/8" wide. 525 is 2,5/8" wide. 520 is 2/8" wide. etc.

So a 530 sprocket can be machined down to 525 or 520, but a 630 sprocket can not be machined down to 530.

[Reinhoud]

It's a GSXR1000 wheel.

 

All done, I didn't do it properly yesterday.

Yesterday I pushed te sprocket by hand against the spacer. Today I put the nut on and tighten it properly, that made 5mm difference.

Sprocket doesn't come out as far anymore.

 

Frame is modified to allow for the chain.

Edited July 5, 2023 by Reinhoud

[Dezza]

ZZR 1100 sprockets have different splines to Suzuki air and oil cooled bikes (which have the same splines). Obviously, this is a very poor show and incredibly inconsiderate of Kawasaki It's the later Kawas (e.g. ZX6R) that have the same splines as Suzukis although none have dished sprockets like the ZZR1100. Some do have a sort of offset sprocket but the splined bit is really thick.

[Gsxrsam]

Weld 2 together then machine off what you don't need......

[TonyGee]

3 minutes ago, Gsxrsam said:

Weld 2 together then machine off what you don't need......

I had that done on the first Zed i built, it had ZZR1100 wheels on. 

[Gsxrsam]

On 7/5/2023 at 6:44 PM, TonyGee said:

I had that done on the first Zed i built, it had ZZR1100 wheels on. 

works for me...