I have another 81 garreli super sport, Not the racing one. After filling it with 93 octane gas and a 5% 2 stroke oil mix I took it for a ride. It started up ok, then when going through an alley at full throttle 35 mph it started cutting out and dying. keep in mind it doesnt like to idle corectly either. Also the transmitiion side gasket is in need of repair it doesnt leak much maybe a tea spoon of oil at a time, But I heard a popping noise in the transmittion. The oil was changed about a week before with 20 weight 4 stroke oil thats what I read in an online manual to use, It took 1 quart of oil. Should I change to ATF? Can any one help with the carb Im pulling it off tonite, the ped had slow acceleration, and it felt like something was holding me back, it is a 2 speed tranny the NO1 model engine. Any help is appreciated. thanks