Thi high-performance option set of low ratio pulleys. The set includes 32T front and rear differential pulleys and Labyrinth Dust Covers (TM), 32T pulley for front one-way, and 18T central layShaft pulleys.

These pulleys result in a new lower internal transmission ratio (1.77 versus 2.125 of the original transmission), giving better acceleration and much smoother performance of the drivetrain.

This high-performance option set works only with a solid central layShaft.