My Genesis Onyx 29 inch cruiser with a H/S 49 cc four stroke motor and a 4G T drive on it has a very hard vibration on initial acceleration. Hard enough that I think it will eventually break the frame at the motor mount.
I think the centrifugal clutch engages too early and lugs the motor causing the bike to vibrate. I look at three possible solutions to this: the first would be to change the engagement to a higher RPM ( I don't know how to do that) the second would be to change the clutch to a hand lever operated slipper clutch (I don't know of one for that motor) the third would be to lower the gearing to accelerate quicker so that it would pick up PRM's easier.
The gearing change would be the easiest way to go but would it do any good? I think that the bike is geared too tall as it is but the most important thing is the vibrations. Please offer some suggestions on this. BTW pedaling does offer some help but the bike is difficult to pedal due to the gearing of the bike and the width of the motor and crank assembly.
I think the centrifugal clutch engages too early and lugs the motor causing the bike to vibrate. I look at three possible solutions to this: the first would be to change the engagement to a higher RPM ( I don't know how to do that) the second would be to change the clutch to a hand lever operated slipper clutch (I don't know of one for that motor) the third would be to lower the gearing to accelerate quicker so that it would pick up PRM's easier.
The gearing change would be the easiest way to go but would it do any good? I think that the bike is geared too tall as it is but the most important thing is the vibrations. Please offer some suggestions on this. BTW pedaling does offer some help but the bike is difficult to pedal due to the gearing of the bike and the width of the motor and crank assembly.
