hi all hope someone can shed some light on this for me? i have a 900ss ie 2001 giving it a good clean as you do and looking at the front sprocket and see that the retaining washer was worn ok get a new one, but looking closer if i push the sprocket back all the way on the shaft as far as it goes and there is about 4mm from the face of the sprocket to the grove were the washer sits is this right ??? think i have read somewhere that some of the ie's have a thicker sprocket mine measurers at 16mm overall the shaft measurement from the face of the bearing to the grove is about 30mm thanks stuart
When you fit the retaining plate and bolt it to the sprocket, the sprocket will be in the right place......once you have fitted it, look down the chain from the rear and you should see the chain is perfectly straight and the sprockets are in line.......or get a good straightedge and lay it across both sprocket with the chain out of the way.
thanks for the reply, i have just made sure all is in line ie the wheels and then checked the line of the sprockets with the plate in place and yes they do line up ( spot on ) but it still has a lot of play, end float and on the parts list it shows shims but the sizes that they give would do nothing that's what made me think i have the wrong sprocket
I think you will find the shims are inside the casing acting sort of as thrust washers.......there are no shims on the outside of the casing between the casing and the front sprocket......You could say the front sprocket 'floats' in the retained plate position.......... .......Yes, I think it is a crap method of retaining the front sprocket, but that's how Ducati appear to do it, with a 2.5mm thick piece of tin.
thanks arquebus looks like that's the way it is then, will fit the new sprocket 14 tooth and new retaining washer then and forget about it
At least it's easy to swap. On the Testastretta, there's is an enormously tight nut to undo - scaffold-bar tight...
just measured my old sprocket yep 16 mm thick and held in place with the daft retaining washer didn't see a mention of spacers in my Haynes manual is your sprocket offset mine are when I first got the bike it had been fitted the wrong way round messing up the chain alignment Honda use a similar retaining plate on gearbox sprockets always thought it was a bit crap as it allows the sprocket to wobble around hence the wear on retaining washer but was told it was deliberate to allow for poor build quality ie sprocket alignment from the factory god knows
thanks jhonboy yes it is offset but mine was the right way round, the shims are shown in the parts list but as arquebus pointed out he thinks that they are inside the crankcase not outside but i thought that it looked outside but i must be wrong as looking at the parts list again the sizes are so thin it would take quite a few to get it shimmed out tight thanks stuart
It's a stupid way of retaining a sprocket IMO............it would be much better if the retaining plate was at least 3mm thick and made of something a bit more than cheese, but a bit softer than the shaft.
