This is a complete replacement kit for the Hammerhead and most other Chinese 150cc drive and driven pulleys. The driver is complete with drive rollers as shown, drive belt 743-20-30, and the driven pulley. The outer drum for the driven pulley is included.
1- M150-1071000 driver pulley
1- M150-1031000 driven pulley with outer drum
1- M150-1033000 drive belt 743-20-30