My MM600 1997 starts fine when cold one pull with choke on idles fine and runs great has about 300 miles on since complete overhaul. plug checks look good machine has SMART CARB my problem is when machine is warmed up I have to give it just a little throttle so it will start any ideas. Engine has wiseco piston, v force 3 reeds MBRP exhaust can. Any help or suggestions.
Typical yamaha alot of them do it. Does the idel hang up before ideling down. Maxdlx