Ok lets start first problem. I put a full Yosi Exhaust on my daughters 660. I'm at 155/160, needle all the way up almost clean. I'm going to 160 165 mains, needle in middle on Saturday this should get rid of blubber top end? Will things change when I get to the dunes this summer with 40-50 degree change. She already had stage 1 cam added K&N with spacer with pipe.
Problem two, Full yosi exhaust pulled spark arrester out off my 660, after full throttle flames. Stage 2 cam 11:1 piston spacer and filter. Help
Problem two, Full yosi exhaust pulled spark arrester out off my 660, after full throttle flames. Stage 2 cam 11:1 piston spacer and filter. Help