Front Sprocket Secured by ?????

mezzer · Post by **mezzer** » 15 Oct 2003, 12:30

Help!

I came to fit a new front sprocket on my mk3 crm yesterday and found the old one to be loose on the splined shaft...

Near the edge of the drive shaft is a groove for a circlip, and between the circlip and sprocket is a spacer/washer-(which isnt thick enough to take up the play)....

looks like a bodge up to me.. and all other bikes ive had always had a locking nut and tab washer to secure the front sprocket not a circlip!

Is that the origional set-up?

Cheers

Wes

Russell · Post by **Russell** » 15 Oct 2003, 13:26

The MK 3 front sprocket is loose on the shaft by design, it is retained by an egg shapped washer which goes on after the sprocket then turns slightly to align the two holes in the washer with the two threaded holes in the sprocket, then two small bolts tighten the washer to the sprocket.
The sproket can not come off as the splines on the washer now misalign but nothing is bolted to the shaft hence the play.
Nothing to worry about I belive the idea was that the only thread that could strip was in the sprocket and therefore cheaper/easier to replace than gear shaft.
You can not use a circlip in this grove as it would stop the sproket coming off the end off the shaft but would not stop the sprocket hitting the engine casing.

Regards

Russell.

mezzer · Post by **mezzer** » 15 Oct 2003, 15:35

Seems like the person who had the bike before me had bodged it up then!

Thanks for the reply cos i now know how it should be, ive got the egg-shaped washer but will need to get a couple of bolts to fix the washer to the sprocket as you mentioned - and bin the circlips that were on it!!!

Thanks

Wes