This is my first MB build. I started out with the Honda engine and Grubee Stage II Gearbox. The gearbox was very noisy so I installed the 4G Belt drive. The belt drive is very quiet and the bike runs very smooth up to 18 MPH, but at 18 and over, the bike is a bit "jerky". It kinda feels like it is not getting enough gas, but the motor is just purring along and doesn't sound like it is starving for fuel. I've replaced the fuel filter, but that didn't correct it. I think it may be in the centrifical clutch. When I start the bike on the center stand the back wheel spins. If I try to start it with the back wheel on the ground it wants to take off. I've got the idle set as low as it will go and still keep running. I've checked the clutch and one of the pins on the clutch plate was out too far and not letting the plate retract all the way. I thought that was my problem so I tapped it in just a little so the plate will retract all the way. However, that did not correct the problem.
Also, when I had the Grubee Stage II gearbox the bike would run around 33 MPH, but now with the 4G belt drive it will only run about 25 MPH. Has anyone else noticed a loss in speed when they switched to the belt drive?
Thanks in advance for any suggestions on correcting my problem.
Also, when I had the Grubee Stage II gearbox the bike would run around 33 MPH, but now with the 4G belt drive it will only run about 25 MPH. Has anyone else noticed a loss in speed when they switched to the belt drive?
Thanks in advance for any suggestions on correcting my problem.