MCS Crankpins

16 products — part of all Crankpins

MCS crankpins for Harley-Davidson cover the broadest range of V-twin applications in the catalogue — from the 1916-1973 45-inch Flathead side-valve through the Knucklehead, Panhead, and Shovelhead generations to the late Evolution Big Twin and XL Sportster platforms. Where specialist brands focus on a narrower slice of the market, MCS's strength is inventory depth: the builder sourcing crankpin hardware for a 1952 Panhead or a 1973 Flathead will find what they need alongside parts for more common Evo-era machines. Precision-ground to OEM specification, MCS crankpins are the practical choice for the workshop doing volume Harley-Davidson rebuild work that needs reliable supply without the wait for niche-brand parts. Iron City Motorcycles stocks MCS crankpins as part of a broader engine rebuild supply that keeps projects on the stand and moving forward. Browse the full MCS Crankpins range below.