I rebuilt a 110. I put in new valves and cut the seats, new rings, and rebuilt the carb. The bike will idel for a while and then act like it runs out of gas and stauls. Sometimes it will restart with one pull sometimes several. Also th bike has no power at low rpm. At full throtel the bike misses and never realy winds out. I think I have it timed right but I am not sure. Any suggestions?