Exhaust Shaft Big Chief/ Duke Rocker Arm

The Exhaust Shaft Big Chief/Duke Rocker Arm (Part No. 0283) is a precision-engineered valve train component designed for high-performance engine builds and restoration work on vintage big-displacement motorcycles. This rocker arm assembly serves as a critical linkage between your camshaft and intake/exhaust valves, translating rotational cam motion into the precise linear actuation required for proper valve timing and lift.

Built to withstand extreme loads and thermal cycling, the rocker arm is manufactured to tight tolerances that minimize deflection under full throttle conditions. The exhaust-specific design accommodates the hotter exhaust valve temperatures without loss of mechanical advantage, maintaining consistent valve clearance across the entire RPM range. Compact dimensions (1.2 x 0.95 x 3 inches) and lightweight construction (0.16 lbs) reduce rotating mass and inertial losses, allowing higher engine speeds without valve float.

This rocker arm is compatible with Indian Big Chief and Harley-Davidson Duke motorcycles, making it an excellent choice for enthusiasts upgrading valve train components for improved reliability. The hardened steel construction and precision bearing surfaces ensure durability whether you're running stock tune or performance cam profiles with aggressive lift and duration.