Loud engine clatter

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Originally posted by Airborne Ranger:
Hey,

My Dad wants to stick with M1 15w50. Thus far besides the clatter the bike runs fine. I tried to talk him into the M1 V twin 20w50, though he doesn't feel it's necessary to fork over the greens for that stuff. His bike after all.

Is it safe to use LC in a wet clutch bike?? Thanks,,,,AR

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Except for the possibility of the 15W50 causing some clutch slippage, it should work fine in his bike. However, if the clattering is something that just started recently, I would change the oil and filter even if I replaced it with the same thing.