Output shaft solution ?

I have a CSR 650. I am planning on getting a newer bike but definitely want to keep my KZ. I will then have all the free time needed to rebuilt it the way I want. I have everything planned but one question eludes me. How to solve the output shaft equation when upgrading to a larger wheel and swingarm. Any suggestions?

Thanks for your time.


home.nycap.rr.com/kz650project/

what are you trying to change?

upgrading the swingarm and complete rear set up. All the parts are most likely going to be from a Suzuki Katana. I am thinking, though, that the sprockets won't line up because the rear wheel will be "fatter" than the original. I know other people have done this before but I don't remember the mention of what to do with the out put shaft to make up for that distance.

You need an offset countershaft sprocket. This countershaft sprocket will have a "spool" welded to the inside to space it out from the engine the proper amount. Not sure who makes them for a 650. Try Sprocket Specialists: www.sprocketspecialists.com/

Did you look through the projects section? George is right there are a few plases that make offset sprockets,Pingel,Shnitz,Precision metalfab racing,Sudco,Kosman,JT sprockets.Find out what the guys are doing, get you rear end, center your rear wheel with you front wheel,then figure out how much front offset you need.You can even shim or mill at the rear sprocket. On a kz900 you can go up to 5/8" un supported.I'm not sure about a 650.And if you go to far you will hit the frame of coures.Then there is the chain choises.530 is popular.You could go 520 and gain more clearance.Good luck, keep us posted on your progress.Better yet, start up a thread in the projects section with lots of pics.Here's mine. kzrider.com/component/option,com_joomlab.../id,103381/catid,11/ Latter.

ok, I was thinking either I would need to shim, or weld. I was wondering if a qualified machine shop could add length to it without loosing mechanical integrity.

Mark mentioned some places that sell offset sprockets. You seem to want to know if a "qualified" local shop could make one. Since there is no standard qualification for a machine shop making sprockets, and the countershaft sprocket is a pretty specialized bit, I would tend to go with one of the established companies Mark mentioned. I think the thing will have to be one piece in order to keep it in balance so welding may not be a good answer.

Oh, I was referring to shaft extension. The sprocket is another option altogether. Thanks, I know now what I must do...

NightRider wrote:

ok, I was thinking either I would need to shim, or weld. I was wondering if a qualified machine shop could add length to it without loosing mechanical integrity.

While possible, it would cost you a whole lot of $$$ to have it done.

Forget Sprocket Specialist and JT Sprockets, I have already talked to both of them about 530 offset sprockets for a 750 four and was told there are no US manufacturers of steel sprockets any longer, it's all moved offshore.

A machine shop can cut the old sprocket and weld it to the new sprocket and create the desired offset.

Off hand I'd guess somewhere near $100 to cut weld and harden it.

NightRider wrote:

How to solve the output shaft equation when upgrading to a larger wheel and swingarm. Any suggestions?

It's funny how one post can provide an answer to another post question. . .

Go about halfway down

That looks like a 630 15 tooth sprocket.$60 at Prigels.