The Overbearing & The Overbearing 2.0
The Overbearing: A Modern Fix for a Century Old Problem Worn-out main drive gear bushings and leaky mainshafts have plagued Harley transmissions for decades—The Overbearing solves both. This innovative upgrade features a high-strength, hardened drive gear nut paired with a precision-ground bearing. By keeping the mainshaft and main drive gear perfectly concentric, it eliminates bushing wear and drastically reduces—if not outright eliminates—mainshaft leaks. Now Available in Two Versions: Overbearing (Original) – Designed for use with all OEM clutch and drive componentsOverbearing 2.0 – Updated with a narrower 3/8" bearing for added clearance when running aftermarket clutch baskets in custom builds • Ensures perfect concentricity between mainshaft and drive gear• Eliminates bushing wear and mainshaft leaks• Fits all Big Twin 4-speed transmissions, 1964 and earlier• Made in the USA Run your Knucklehead or Panhead transmission with more horsepower and longer intervals between rebuilds. T