Our 8mm belt drives have been around for many years. Most belt drive enthusiasts still think that these units are the best size and combination for all around riding and dependability. This drive adapts your stock clutch directly into our basket or you can upgrade your clutch to BDL's CC-100-S Competitor clutch for 30% more clutch surface than stock. For 1979-1984 Shovelhead electric start rear belt models.