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View Full Version : 250 big red engine knocking need help!!



shdtreemechanic
05-15-2015, 10:40 PM
Ok among everthing else i have a knocking coming from the engine at high speeds it doesnt do it until I get above half throttle, now if im not riding it in neutral i can rev it up and no knock could this just be spark knock? If so how can I get rid of it on this bike.