11MM/1.5 INCH PRIMARY BELT DRIVE WITH IDLER GEAR – ELECTRIC START – 1965-E1984 HARLEY-DAVIDSON BIG TWIN

Primary Belt Drive | The 11mm/1.5 inch primary belt drive with an idler gear for electric start-equipped 1965–early 1984 Harley-Davidson Big Twin motorcycles is a popular aftermarket upgrade. This type of belt drive system replaces the stock chain-driven primary drive, offering several benefits for Harley enthusiasts.

Features and Benefits | Buy Primary Belt Drive Online

1. Belt Specifications:
   • Size: The belt is 11mm pitch and 1.5 inches wide, providing a good balance between strength and compactness.
   • Material: Typically made from durable materials such as Kevlar or fiberglass-reinforced rubber, ensuring longevity and resistance to stretching.
2. Compatibility:
   • Models: Fits Harley-Davidson Big Twin models from 1965 to early 1984, including Shovelheads and some early Evolution engines.
   • Electric Start: Designed to work seamlessly with electric start systems, accommodating the starter ring gear.
3. Performance Improvements:
   • Reduced Maintenance: Unlike traditional chain drives, belt drives do not require lubrication and frequent adjustment, leading to lower maintenance.
   • Smoother Operation: Belts tend to run quieter and smoother compared to chain drives, which can help reduce vibration.
   • Weight Reduction: Typically lighter than a chain and sprocket setup, potentially improving acceleration and handling.
4. Idler Gear:
   • The included idler gear helps maintain proper belt tension and alignment, ensuring reliable performance and preventing belt slippage.
5. Installation Considerations:
   • May require some modifications or additional parts, such as a new primary cover or inner primary case, depending on the specific bike model.
   • Proper alignment and tensioning during installation are crucial for optimal performance and longevity.

This belt drive system is ideal for riders looking to upgrade their classic Harley-Davidson Big Twin for a more modern, efficient, and low-maintenance primary drive solution.

BDL’s 11mm belt drives have been around for many years. Most belt drive enthusiasts still think that these are the best size and combination for all around riding and dependability. This drive adapts your stock clutch directly into the belt drive clutch basket, or you can upgrade your clutch to BDL’s Competitor clutch for 30% more clutch surface than stock. Fits 1965 – E1984 Shovelhead electric start 4 speed models. See Additional Information below for fitment.

• Pulley And Clutch Basket Are Hard Anodized Aluminum; Front Pulley Is Drilled And Tapped For Easy Removal
• Inner Clutch Hub And Plates Are Not Included; Must Be Purchased Separately
• Made In The U.S.A.