I seem to post on here often, just realized that. Anyway, quick problem. I started my bike (97 zx9r) once in a while inthe morning, same ole thing. This morning, ran out of gas so tonight, I filled it up with some Chevron Supreme with more techron, the highest octane. Anyway, I started her up and popping noises starts coming out of the exhaust when I revv the engine at around 6rpm. Pop Pop Pop and I revvd it at around 11 and actually saw a bit of blue flame come out of the exhaust...?? That has never happened before and I was wondering if it's the gas bc there's nothing else I changed..
Any help would be appreciated. Thanks!