Thanks for the welcome all of my sttock stuff got lost so I bought all new thumb throttle including the towers or swithces on top of the carbs. iT RAN GREAT with the twist on it before I changed back to a thumb so I do not think it is jetting. I realize it is a 2 stroke but it will smoke out the whole garage in 15 seconds and will not come up on the pipe untill third. The switches I am talking about also plug in to other wiring on the bike dont know if it will help you help me but the connections are grey with two wires to each connection and eacb carb has one..Kirk