Replacement 61 inch Knucklehead cylinder and piston kit are honed and pre fitted with 7.5:1 compression cast pistons and rings. Cylinders feature four fins. They are ready to run and will require break-in. Please refer to proper shop manual for suggestions on break-in. For stock stroke only. For 1936-1947 Knuckleheads. *NOTE: All cast iron cylinders have same piston to wall clearance .0025 -.003. *NOTE: Replacement type cylinder kits do not have original motorcast markings on the cylinder base.
FITMENT
ACCESSORY ITEMS
REPLACEMENT PARTS