Motorshop 74 Inch Knucklehead Cylinder Piston Kit For Harley Davidson FL

A replacement 74 inch Knucklehead cylinder and piston kit, honed and pre-fitted with 8.5:1 compression cast pistons and rings. Set bears no factory markings and is designed for authentic restoration and reliable performance on Harley Davidson FL models from 1941 to 1947.

These cylinders are ready to run and require a proper break-in procedure per your shop manual. Designed for stock stroke applications, they feature a bore size of approximately 3.438 inches in diameter. The cast iron construction provides uniform piston-to-wall clearance of about.0025 to.003 inches, supporting steady performance with minimized piston slap and wear. The kit is without the lip on top to match original Knucklehead specifications, and it does not include the head base gasket (order separately).

• Bore: approximately 3.438 inches diameter
• Material: cast iron
• Piston-to-wall clearance: about.0025 to.003 inches
• Top lip: without lip on top
• Includes rocker arm end play shims:.005,.007,.015 inches
• Includes shims for rocker arm end play adjustment
• Made in Taiwan

Fits Harley Davidson FL models from 1941 through 1947 and supports an authentic look and function for vintage engines.

Replacement 74 inch Knucklehead cylinder and piston kit are honed and pre fitted with 8.5:1 compression cast pistons and rings. Set does not feature any factory markings.

The Motorshop 74 Inch Knucklehead Cylinder Piston Kit is designed for authentic restoration and reliable performance on Harley Davidson FL models from 1941 to 1947. These cylinders are ready to run and require a proper break-in procedure, which should be followed according to your specific shop manual. Crafted for stock stroke applications, the cylinders feature a bore size of approximately 3.438 inches diameter, ensuring a precise fit for vintage engines. The cylinders are without the lip on top, which is typical for these models, and the kit does not include the head base gasket, which must be ordered separately. All cast iron cylinders in this kit share a piston-to-wall clearance of approximately.0025 to.003 inches, providing optimal performance with minimal piston slap and wear. The kit is suitable for those seeking a high-quality replacement that maintains the original look and function of their vintage engine.

Features:

• Ready to run cylinders requiring proper break-in as per shop manual

• Designed for stock stroke only with a bore size of approximately 3.438 inches

• Cast iron construction with uniform piston-to-wall clearance of.0025 to.003 inches

• Without the lip on top, matching original specifications for 1941-1947 Knuckleheads

• Compatible with Harley Davidson FL models from 1941 through 1947

• Includes shims for rocker arm end play adjustment, with available sizes:.005,.007,.015 inches

• Made in Taiwan with high-quality craftsmanship

• Does not include head base gasket, order separately

Fitment:
Harley Davidson FL 1941
Harley Davidson FL 1942
Harley Davidson FL 1943
Harley Davidson FL 1944
Harley Davidson FL 1945
Harley Davidson FL 1946
Harley Davidson FL 1947