My hypermotard 1100 s clutch was playing up. The position of bitting point would change, then one day i was in first gear waiting to pull out onto a major road and the bike lunged forward!! As i didn't have any throttle on, the bike done its best rabbit impression and we hopped down the road until I managed to hit the kill switch. After a quick visit to the near by hedge to discard my heavily soiled pants! I started the bike and had an uneventful ride home. I had it looked at the next day and the bloke said it's a hydraulics problem and investigated. He came back and said the slave cylinder was leaking, that he had looked at the plates and although they are slightly worn it was nothing to worry about. He did say the first plate was not bed properly and was sitting slightly out of the carrier, but he had pushed it back in. Job done! All was well clutch was lighter, bitting point was where i had left it the previous time. . . . . . . Until i completely destroyed another set of pants while waiting at a set of red lights. The clutch is now working although bitting point has started to move around again. I phoned my bloke back and he said it sounds strange but still thinks it's hydraulics. So he is going to look at the master cylinder and investigate the positioning of the first plate a bit further. Has anyone had this problem or know what it is?
Wow, thanks for quick response. I had a new slave cylinder fitted. There are no unusual noises coming from clutch.
I've never done one, but, if the bearing in the clutch pressure plate is seized or tight, it spins the push rod which spins the slave piston promoting leaking/air ingress and heat, you stop, it cools, then away you go again, then you pull up at another set of lights, clutch pulled in, rod spins and it all happens again, easy to check apparently, not saying this is your problem but worth checking before a big spend.
I've had this and it can also twist the push-rod. Easy enough to check on a dry clutch. whip it out & check if it spins freely.
If the first plate wasn't sitting in the basket correctly, i'd guess the clutch pack needs adjusting. I fitted a brand new clutch last week and that needed a tweak with some thinner plates.
