Install 150-series tires on 5-speed Big Twin models by converting from belt to chain drive. Offset 24-tooth front sprocket and spacer moves the rear drive chain away from the tire. The stock final drive ratio on 5-speed models is 2.1875. Installation in conjunction with a 51-tooth rear sprocket will change the ratio to 2.125, with a 48-tooth rear sprocket it will lower to 2.000 which is ideal for stroker motors.
85-94 FX Model, 86-06 Softail