RPM clock doing weird things

[ghostbiker]

as above, its Exup fault code.
Pats site (the above link) is a great guide on how to service it. its something that not included in the normal service so is overlooked and needs regular maintanance. once you get used to it, it takes 10-15 mins tops. but for first time take you time and soak all bolts in pen fluid for a few days before trying to remove them.