engine

I need help, i bought a 2013 switchback adventure that needed a new wire harness, installed and got it running but constant backfire at low idle through exhaust. What could be the issue?

My 2003 Edge 600 runs fairly well but not how Id like it to. I took the carbs and reed valves off today and when I cracked the flange bolts on the left reed valve fuel started pouring out (maybe half a quart total). I got the reed valve assembly off and the whole lower piston housing (where the...