Jus the carb ..what jet ya got in it? And where are u located? Reason I ask location it altitude means everything to getting .. get back with me and let me know I'll tell ya what mm jet to run .. best to ya!Hey everyone! I'm new to the forum, but not exactly new to building motorized bikes.
This is my 3rd build. I kept wanting something faster after building the last two, so this time I went with a GT7 kit with the GT90 conversion kit. Rebuilt the engine, got it set up and all.
The problem I'm having is the bike sputters so badly it won't run on its own until it reaches about 15mph, then it's like a switch flips and it runs great and gets up to 30mph with a 44 tooth sprocket. But under 15mph it's useless.
Tried different spark plugs, a different voltage regulator that worked on another bike, and tried with the choke on and off. Only things I can think of are that the carb that came with the GT90 kit is too big to pull in enough air at low RPMs or something is wrong with the coil on the engine that generates the electricity for the spark plug.
Any ideas? Thanks
HEY GUYS, I BOUGHT A GT7 KHIEN REED MOTOR TOO, AND MINE IS DOING THE SAME THING BASICALLY. EXCEPT MINE DIDN'T COME WITH A WINDOWED PISTON, JUST THE REED TRANSFER PORT CYLINDER. SO SHOULD I ORDER A WINDOW PISTON?.Jus the carb ..what jet ya got in it? And where are u located? Reason I ask location it altitude means everything to getting .. get back with me and let me know I'll tell ya what mm jet to run .. best to ya!
I have a question will the GT90 Ported piston fit in my GT7 motorThe window piston is necessary to make more power with the reed setup. Buying a widow piston is the cheapest way to make your reed engine work and carb for a novice engine tuner. The vendors should package the piston with the reed and carb or at least include good instructions on how the reed kit should be installed, but don't.