12.6 12 BDL 8mm Primary Belt Drive Kits for 4-Speed Models The 8mm belt pitch has been used for years on primary drives and the 1-1/2"-wide kit is considered by many to provide the best allaround combination for dependable operation. Kits include front pulley, rear clutch and hub/pulley . Designed for use with existing clutch hub and clutch. 42524 40/60-tooth pulleys for electric start models from 65-78 42525 41/61-tooth pulleys for electric start models from 80-E84 42526 Same as CC #42525 but specifically for models with factory rear belt drive and belt drive inner primary 42527 39/62-tooth pulleys for kick start models with tapered engine shaft from 36-54 42528 39/62-tooth pulleys for kick start models with splined engine shaft from 55-64 42529 40/62-tooth pulleys for kick start models with splined engine shaft from 65-78 42530 41/61-tooth pulleys for kick start models with splined engine shaft from 79-E84 BDL Wide-Belt Primary Drives for Kick Start Big Twins The 2" and 3"-wide pulleys and clutch hubs are cast from 356-T6 aluminum and machined in BDL’s own foundry and machining operation. These kits use the stock clutch hub and clutch, and include 76-tooth clutch basket and 47-tooth engine pulleys, 8mm-pitch belt, and ‘Big Fix’ clutch hub roller bearings. 42534 3"-wide kit for Big Twins with splined shaft from 55-E84 42532 2"-wide kit for Big Twins with splined shaft from 55-E84 BDL 11 mm Primary Belt Drive Kits 1-1/2"-wide, 11 mm belt kit. For precision belt adjustment, kits for aluminum-primary Big Twins include a BDL idler that makes sure belt tension is correct (tin primary models use tranny adjustment for correct belt tension). All kits use 31-tooth engine pulleys and 47-tooth clutch pulleys. 42589 Fits 5-speed models with electric start from 80-E84 42588 Fits 4-speed models with electric start from 65-E84 42587 Fits splined shaft 4-speed kick start models from 65-E84 42586 Fits splined shaft 4-speed kick start models from 55-64 42585 Fits tapered shaft 4-speed kick start models from 36-54 BDL 8 mm ’Bolt-In’ Belt Drive Kits Engineered to handle the most brutal torque and horsepower demands. Requires no primary case modifications to install. Features a cylindrical-shaped, replaceable clutch dog capable of withstanding 1200 foot pounds of torque. BDL’s steel hub design moves the clutch basket inward, eliminating unnecessary weight hanging from the mainshaft. Barnett Kevlar® clutch provides 70% greater surface area than stock for maximum hook-up. Complete kit includes front and rear pulleys, clutch, and a sealed clutch hub bearing. 42520 Fits 90-06 Softail and 91-05 Dyna Glide models 42518 Fits Softail models from 86-89 42521 Fits 4-speed Shovelhead models with chain rear drive from 70-E84 42674 Fits 4-speed Shovelhead models with belt rear drive from 80-E84 DuPont™ and Kevlar® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company.
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