Thanks Capt, have done that but what I like to know is FA 80 specifically. Ive got the conversion kit from CH ignition and it runs but seems to loose power aft mid throttle, could be engine faulty and have sent it for repair. The other thing I would like to know is how stable can it run for the long run, I've got black carbon gg back into the tank and also engine very hot, will using the original carb spoils the carb in the long run or is it ok? anybody out there with successful conversion contribution will be so much appreciated ! thanks