Originally Posted by neum5464
125cc Semi Auto Motor Engine w/Reverse (3F + 1R) 4 Wheeler ATV Gokart Quad Bike
Big Boy Cycles uses this type of motor in their very cool motorized bikes.
They come without the reverse gear and others here have put them in
stretched bikes or angled the motor to fit in a smaller frame.
I rode a Silver State Cycles frame with this kind of motor at one of the races.