Whats up guys? I have had my bike now for about 6 months and I absolutly love it I followed your instructions on how to adjust valves and maintain it and enjoy working on on it. All of the problems people talk about starting puzzles me b/c mine starts on the first kick (cold) every time and first or second when hot. I know my packing is gone in the stock exhaust (stock muffler and aftermarket header pipe) and it pops or backfires when I let out of the gas in the high RPM range. Today I put 2 strips of duct tape ( yea duct tape I know ) over the air box and it cured it pretty much. Of coarse I run no air box lid. So I inturprate this as meaning I'm running lean and need to re-jet. I 'm thinking 1 size bigger main and smaller needle or bigger needle jet. ...Also I was tuning my fuel/piolet screw and the darn thing fell out somewere. I put a reg. screw in (until I can get another) and dosent idle perfect but seems to run fine (maby a little slower). Anyone got any ideas? P.S If any one on this site has not done the bk mod they need to be shot.