I recently got a new leo vince exhaust put on my Hyosung gt650r and it makes the bike sound a lot sweeter. But tonight while riding in the dark with no cars around and only few dim street lights when it backfired and i actually saw a flash of light off the trees around me which i thought might be from a bit of flame. My question is as a newbie to aftermarket parts is this a normal thing for a after market exhaust? Is it doing any damage to my bike or exhaust? It only backfires every now and then more so pops a little when throttling off.