Although I have a Hayabusa, question would be relavent to any bike engine I guess and my question is this:-

The sprocket adaptor is held in place with a 32mm nut. Behind this is a washer. I need to 'shim' the adaptor away from the engine to clear the slave cylinder mounting and this nut is just the right size, so can I put the nut on the shaft, then the adaptor and then the retaining nut? Its not a tabbed washer or shakeproof or anything like that so I cant think of a reason why I cant do it, but can anyone else??

Cheers peeps!

I don't understand how you can put a nut on a splined shaft. I guess I am being stupid.

Now, if you mean the washer is the right size, then I think I might understand what you are trying to do. I have a GSXR 1100 which is probably similar. The clutch was a bit of a pain too!

I guess it comes down to how much spline is left exposed at the nut end of the shaft. If you want to have a tabbed washer that fits over the splines, then you will need to have exposed spines, which you may lose with your shimming.

Seems to me, different people have different views on how to keep that nut tight, but I would have thought it would not be a good idea for it to be tightened against the adapter.

I'd be interested in the views of others on this.

Matt

Bikes load the sprocket from behind, ie pull across the engine, the adaptor merely loads the torque in line so I cannot see any reason why not. Its far more gentle on the gearbox.

As the sprocket/adaptor is on splines and will locate on a machined flat just putting a washer may not be good enough when spacing out, you may need to think about turning down an old sprocket as a spacer as this will be made of hard metal and will locate on the splines as well.

Regards Mark

With the adaptor in place there is around 1-2mm of splines protruding, the washer sits over these and then the nut. With the washer on first the splines are slightly under the face of the adaptor so the nut can be wound up to the proper torque.

Hadnt thought about the fact that without the washer the adaptor is sitting against a machined shoulder that is probably hardened, although the washer is bigger then this shoulder.

Cant really machine anything off the rear face of the adaptor as the face that needs material removing is where back edge of where the prop bolts to and this is only 4-5mm thick. Dont want to make it thinner!