Mainshaft Spacers

2 products

Our mainshaft spacers for Harley-Davidson — listed under Transmission — are the same precision spacers used to set mainshaft endplay on classic Harley-Davidson transmissions. Iron Stable is run by Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, and this very small section is supplied by MCS. Fitment covers 1941–1973 45-inch Flathead Harley-Davidson transmissions. A correctly shimmed mainshaft keeps any vintage Harley-Davidson gearbox shifting cleanly. Browse the full range below.

OEM Replacement Parts OEM Only — Active Genuine H-D & replacements Tap to clear filter Custom & Performance Aftermarket Only — Active Upgrades & Aftermarket Tap to clear filter
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