Mine did this exact same thing, eventually (in the middle of nowhere by myself) it finally totally quit. I found the main fuse blown. Now I carry several spares. It has not done it ever again.ok im kinda confused quad is cutting out, backfireing, and all the lights on the dash are coming on under hard acceleration (minus the neutrel light cuz its in gear) Quad will start, idel, run fine, only doing this under throttle. checked connections, changed plug, changed oil, battery connections fine...dont know what else to do besides take it to someone...maybe stator? voltage regulator? all lights seem to work fine and dont dim or anything. anybody experience anything like this?