I picked up an 02 954 for 3300 bucks it didnt run when i got it but it turned out to be the ignition switch. After getting it running i noticed a clicking loose chain noise coming from the motor well i tore it all apart and adjusted the valves every single one was out of the minimum specs some worse the others. Well after i reshimmed the valves and got it all back together I started it and it seems to run great on the street but at an idle there is a loud click everyonce in a while and a surge of air it sounds like and the motor stalls for a second then picks back up on the RPM's. After pulling the gas tank and watching it run I noticed that the starter valves are opening and closing I am assuming they are not suppose to open like that unless the motor is cold and gets up to temp but that is just my opinion i have read that they are basically like an air/fuel mixture screw and the need to be in sync. The thing is tho that before i reshimmed the valves i never heard this noise and they were not opening and closing like they are now. If they are out of sync could this be a cause for them to open and close like they are. The bike seems to be fine when im riding it just when i come to a stop light it starts doing it. Someone please help me!