My friend with the 750 had told me the other day that the bike running rough deal only occurs when the bike warms up. The bike was in storage for awile and recently taken out. My guess is to flush out the old gas and replace with new to start. The backfiring still occurs though so there might be a possibility of more than just bad gas!!!!! If anybody has an idea of why this bike may be running rich please get back to me!!!!!! Thank you !!!!!!