47-31SE-4 BDL, 1-1/2" 11mm primary belt drive kit. Closed. E-start

For those running a classic 4-speed Big Twin from 1965 to 1983, this Belt Drives Ltd. 1-1/2 inch primary belt drive kit is a fantastic upgrade for closed primary setups. This kit is designed for electric start models and features an 11mm pitch with an included idler to maintain proper tension. It is supplied as a pulley and belt kit only, allowing you to reuse your stock clutch assembly while benefiting from the smooth, quiet operation of a belt drive. With a 47-31 drive ratio, it provides reliable power transfer. If you ever need a replacement belt, you'll want to look for the 99-tooth 11mm pitch version.