My bike was originally bought with stock jetting and after-market pipes. I had the cylinder replated and new exhaust valves installed. Since the bike has always run a little on the rich side, I tried adjusting it with the needle clip without any result. Recently removed the 150 stock pilot jet and installed a 146 main pilot jet. The air screw is turned out to 1 1/2 turns. With this setup the plug doesn't foul out anymore, but I don't think I'm getting the proper throttle response. Any suggestions?
