it looks like the pulleys are to big for the frame that would not leave enough space for the belt to wobble, the sliders on the back of pulley broke from over torque as the pulley is on the boss with no power from crank shaft except from the sliders , and the outer pulley , lighter roller sliders might have worked by not pushing the belt out to far, I would have reved the motor with the tranny cover off , to see how it worked , before riding it, hind site is always 20 / 20