I just installed a hinson clutch basket and rebuilt my top end. After putting the basket in I notice a funny noise when the clutch lever is out. I pull the lever and it stops. Is this normal or do I have a bearing or something going out. Plus after I redid the top end the bike has started to backfire I adjusted the fuel screw and it is not as bad. Do I need to fine tune the fuel screw or is the timing off? I dont think it the timing because it still runs, but I am not 100% sure. Please help me if you can.