My 17 Sherco Factory would would rattle sometimes on startup for 30 seconds or so. I didn’t dig into it to much but it sounded like detonation. I thought it was the fuel in the float bowl had lost octane while sitting and would cause the rattle until the bowl was replaced with new fuel. It seems I’ve read about this happening to dirt bikes before.
Sherco 17 engine rattle on cold start
in Sherco
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My 17 Sherco Factory would would rattle sometimes on startup for 30 seconds or so. I didn’t dig into it to much but it sounded like detonation. I thought it was the fuel in the float bowl had lost octane while sitting and would cause the rattle until the bowl was replaced with new fuel. It seems I’ve read about this happening to dirt bikes before.