Belt Drives 47-31 SK-2 11mm Primary Belt Drive Kit Kick Start Spline Shaft

The Belt Drives Ltd. 47-31 SK-2 is an 11mm closed primary belt drive system designed specifically for 1955-1964 Harley-Davidson Knucklehead and Panhead kick start models with spline shaft transmissions. This time-tested 1-1/2 inch belt drive kit replaces the stock chain-driven primary system with a smooth, efficient belt drive that reduces noise and vibration while transferring power over 10% more efficiently than traditional chains.

Key Features:

• Hard anodized aluminum pulley and clutch basket for superior wear characteristics
• Front pulley is drilled and tapped for easy removal
• 31-tooth/47-tooth pulley combination for optimal performance
• Compatible with stock clutch hub and plates
• Optional upgrade to BDL CC-100-S Competitor Clutch for 30% more clutch surface
• Closed primary design without idler bearing
• Hardened clutch dogs and chrome-moly carbonized steel bearing surfaces
• Made in the USA

This proven belt drive system has been trusted by vintage Harley enthusiasts for years, offering exceptional dependability and durability. The kit works with your existing inner clutch hub and plates, which must be purchased separately if replacement is needed. Belt Drives Ltd. components are manufactured to exacting standards for unsurpassed quality in the motorcycle industry.