Replica 74 inch Knucklehead Cylinder Kit Black The rear cylinder has the original casting marks of MoCasCo on the left side inch2-86 inch. Cylinder castings are replicated after the post production of the 1974 Knucklehead pre-1950. *NOTE: See additional photos....

Replica 74 inch Knucklehead Cylinder Set Black The rear cylinder has the original casting marks of MoCasCo on the left side inch2-86 inch. Set includes front and rear cast iron 74 inch cylinder set with original casting MC markings. Set...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .010 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .010 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .020 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .020 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .030 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .030 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .040 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .040 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .050 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .050 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .060 O The skirt dimension across the widest part of the piston measures 3.485 inch. **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .060 O The skirt dimension across the widest part of the piston measures 3.485 inch. **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .070 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .070 O **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson...

Replica 74 inch Overhead Valve 3-7/16 inch Piston Set Standa **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. Bore size is 3.4380...

Replica 74 inch Overhead Valve Piston Set .005 Oversize **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS Harley Davidson FL 1941...

Replica 74 inch Overhead Valve Piston Set .010 Oversize **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. Instructions: http://www.vtwinmfg.com/Instructions/MS/Piston Fitment.pdf FITS Harley...

Replica 74 inch Overhead Valve Piston Set .020 Oversize **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. Instructions: http://www.vtwinmfg.com/Instructions/MS/Piston Fitment.pdf FITS Harley...

Replica 74 inch Overhead Valve Piston Set .030 Oversize **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. Instructions: http://www.vtwinmfg.com/Instructions/MS/Piston Fitment.pdf FITS Harley...

Replica 74 inch Overhead Valve Piston Set .040 Oversize **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. Instructions: http://www.vtwinmfg.com/Instructions/MS/Piston Fitment.pdf FITS Harley...

Replica 74 inch Overhead Valve Piston Set .050 Oversize **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. Instructions: http://www.vtwinmfg.com/Instructions/MS/Piston Fitment.pdf FITS Harley...

Replica 74 inch Overhead Valve Piston Set .060 Oversize The skirt dimension across the widest part of the piston measures 3.485 inch. **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in...