Ratchet Tops

1 products

Our range of ratchet tops for Harley-Davidson covers replacement and rebuilt ratchet shifter top assemblies for vintage 4-speed Big Twin transmissions. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, stocks ratchet tops from MCS — the long-established Harley-Davidson aftermarket supplier whose transmission internals are widely used across the restoration and custom scene. Fitment covers 1952–early-1979 4-speed Big Twin models with foot shift, suiting Knucklehead, Panhead and Shovelhead Big Twin restorations during the era when foot shift replaced the earlier hand shift. The ratchet top houses the indexing and detent mechanism that lets the rider change gears with a single foot stroke — a worn or damaged ratchet top causes missed shifts and false neutrals. Whether you're refreshing a Shovelhead-era 4-speed during a transmission rebuild or restoring a Panhead with a foot-shift conversion, the correct ratchet top assembly is essential. Browse the full range below.