i would link some info on my 1993 r100gs. the clutch has started to slip at higher revs. when i give it full revs ie going for an over take. i have check the clutch cable and it fine as it pulls off ok. there is no slipping when i am riding slow or at low revs, slowly speed up. could oil have got in to the clutch? will i have to take the clutch out and have a look thanks for the help.