Knocking noise coming from top end

Ahoffman03

New Member
Feb 23, 2025
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I just bought this blaster. The guy I bought it off of says he had 9 hours of run time on the new rebuild. It’s bored .20 over with a weisco piston. I rode it for about 2 hours know and I notice a knocking sound coming from the top end. Idk if it’s normal or not for a two stroke. I’m used to four strokes. I also notice that the on position for the fuel is clogged but the reserve isn’t not. Idk if these things suck the fuel in or not.