Application for: The Centrifugal Clutch is ideal for three wheeler, ATV’s, LTV’s, GO KARTS, and other transportation vehicles. Fits 8HP -16HP engines Specification?? Clutch Bore: 1″ (25.4mm) Rotate Speed Range: from 2000 to 3600 RPM Fit Engines: 8HP-16HP engine, 1″ (25.4 mm) Bore with 1/4″ (6.35 mm) flat key way Belt section 2A or 2B Heavy duty, High quality Durable and reliable Reference part number: Fit For 200630 Condition: 100% Brand New