hope someone can help
i have an 84 gl1200a. slips when warm...changed fibers and steels,rebuilt master cylinder...replaced slave cylinder...bledd system many times...flushed system
driving me nuts....any ideas as to why it still slips
Gwrider, when does your clutch slip?.. All gears?.. Under full power only?.. At high speeds only?.. You say warm, does that mean it doesn't slip when cold?
It could be anything in your clutch system from a worn clutch basket (notches in the basket sides),, to a weak spring (did you check that when apart?),, to pressure build-up in the master/slave cylinder system..
With your slipping problem only happening warm (hot) that usually points to pressure build up in the clutch hydraulic system.. You could have a master cylinder not allowing the take up port to uncover when hot, clutch lever or push rod not correct or not allowing the master cylinder piston to return fully.. Could be a problem in the clutch itself (probably should slip cold also if a problem there but you never know)..
Have you tried riding the bike until hot & the clutch slips,, then opening the lower slave cylinder bleeder & seeing if excess pressure/fluid comes out.. If so then ride the bike again without using the clutch & seeing if it still slips?
While I haven't ever seen it happen with a hydraulic clutch I have seen a brake hose internal liner problem that would allow the inner liner of the brake hose to trap brake fluid pressure & cause a brake to drag hot.. (long shot but possible)..
If you could remove your clutch bleed screw,, then obtain another bleeder screw & drill a small hole in the slave side end (to allow fluid to pass).. Then braze on a pipe thread fitting you could then hook a pressure gauge to your slave cylinder & see if your system is trapping fluid pressure when hot.. That would at least tell you if your problem is clutch plate/basket related or hydraulic pressure related..