Rear Master Cylinder Plungers

3 products

Our range of rear master cylinder plungers for Harley-Davidson covers replacement plunger components for hand- and foot-brake master cylinders fitted to vintage and Evolution-era Big Twin platforms. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, stocks rear master cylinder plungers from MCS and Paughco — two well-established Harley-Davidson aftermarket suppliers with deep stock of vintage hydraulic brake components. Fitment covers 1958–1969 FL, 1970–early-1979 FL, 1971–early-1972 FX, late-1972–early-1979 FX, 1984–1986 FXWG and 1987–1999 FLST (excluding FXST). When the master cylinder plunger pits or the seal hardens, brake feel deteriorates and pedal travel grows — replacing the plunger and seals at the same time as a fluid flush brings hydraulic feel back to spec. Whether you're refreshing a 1960s Panhead Police bike or a Shovelhead-era Tour Glide, fitting a fresh plunger is the right fix. Browse the full range below.