Originally Posted by sczx10r
nooooo synthetics kill the clutch plates just buy good ol oil nothing special just oil castrol or somthing. syn's tear the slipper clutch up
As a general statement, that's hogwash. I have been using Mobil 1 "car" synthetic oil in my bikes for years, and that includes street bikes and race bikes. Clutch life has been normal. Yes, I have had to replace clutches ... but the original clutch in my '94 ZX9R lasted until 105,000 km before it started slipping, and that clutch did see the occasional hard launch, wheelie, or burnout, so I'd say that was quite normal and nothing to complain about.
There may be SOME oils, synthetic OR NOT, which may cause problems with wet clutches, but the previous formulation of Mobil 1 was OK. The new formulation hasn't been around long enough to comment on it.
If you really want to be sure, just use a synthetic oil that conforms to the JASO MA specification. One such oil is Mobil 1 MX4T 10w40. There are various others from Elf, Motul, etc.