1963 Superhawk Oil Weight
Clutch slippage: Didn't hold too much weight with the argument that synthetic, etc. oil could cause slippage. Then, I put it in my 1984 Nighthawk and quickly noticed clutch slippage. Swapped out to "normal" 10w-40 and the problem went away.
2010 Kawasaki C14
2007 Ural Tourist LX 1997 Kawasaki ZX-11 1984 Honda Nighthawk S 1976 Honda CB750 1965 Dream 305
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