Inner Primary Bolts

1 products

Our inner primary bolts for Harley-Davidson are the fasteners that secure the inner primary cover to the engine crankcase on vintage Harley-Davidson Big Twin bikes. Iron Stable is run by Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, and this very small section is supplied by MCS. Typical fitment covers 1970–1986 4-speed Big Twin — the Shovelhead and early Evo-era Harley-Davidson Big Twin engines with the distinctive 4-speed primary configuration. Correct-grade bolts ensure the inner primary stays torqued to spec on any classic Harley-Davidson rebuild. Browse the full range below.