The 5-inch centrifugal clutch pulley drive features a 25.4mm (1 inch) bore and a 130mm (5 inches) outside diameter, specifically designed to fit B-series belt types securely and precisely. It is compatible with engines ranging from 9hp to 25hp and includes a 1/4 inch key way , making it versatile for various applications. The clutch is optimized for initial engagement at 1100-1200 RPM, with full engagement at 2200 RPM and a maximum of 4000 RPM, ensuring smooth operation and efficient power transfer. Constructed from durable, hardened steel, it offers long-lasting performance and reliability.