Jims Crankpins

16 products — part of all Crankpins

Jims crankpins for Harley-Davidson are precision-ground components from a manufacturer that works exclusively in the Harley-Davidson V-twin space — no compromises, no multi-platform catalogue hedging, just purpose-built engine components meeting professional rebuild standards. The Jims crankpin range covers the entire Harley-Davidson bottom-end spectrum: from 1929-1973 45-inch Flathead W and G models through Knucklehead, Panhead, and Shovelhead Big Twins to the late Evolution era. Jims' dimensional accuracy is the point — a crankpin that's even fractionally out of specification creates vibration, bearing wear, and eventual catastrophic failure on a Harley-Davidson V-twin. Iron City Motorcycles stocks Jims crankpins because when you're building or rebuilding an engine bottom end, the pin is not the place to cut corners. The investment in precision pays for itself in longevity and smooth running from the first mile after reassembly. Browse the full Jims Crankpins range below.