MCS Cylinders

25 products — part of all Cylinders

MCS cylinders for Harley-Davidson cover a vintage range that is difficult to source through mainstream channels — 1936–1947 Knucklehead in both 61 and 74 cubic inch configuration, 1948–1965 Panhead 74 cubic inch, and 1966–1984 Shovelhead, alongside 2000–2022 XL Sportster 1200 applications. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, stocks these cylinders for restoration and rebuild projects that demand correct castings for period-accurate work. Cylinder dimensions on Harley-Davidson engines are closely tied to displacement — bore, deck height, and spigot diameter must match the specific engine year and configuration exactly to achieve correct compression and sealing with the original head. MCS supply cylinders to the period-correct specifications for each engine family, which is a meaningful distinction when restoring a Knucklehead or Panhead rather than building a generic big-bore street machine. Browse the full range below.