SKU:10-4147
Replica 74 inch long-block Knucklehead engine, fully assembled and tested for oil pressure, designed for restoring or customizing Harley-Davidson EL and FL models from 1941 to 1947.
This fully assembled engine mirrors authentic cast-iron profiles and features overhead oiler provisions from the timing cover for proper lubrication and vintage aesthetics. It includes polished rocker boxes and newly cast Knucklehead heads with parkerized lower valve cover cups and tops for durability and period-correct styling.
Components are assembled with stock rods and Torrington rollers with steel cages at the sprocket and pinion shaft ends, replicating original specifications for authenticity and strength. The valve train uses solid tappet assemblies with the Sifton Lightning cam, Sifton solid stock pushrods, and chrome pushrod covers for smooth, reliable operation. Cast-iron cylinders house 8.5:1 pistons and Hastings rings to balance compression and performance.
The oil system features a mechanical-advance distributor, relay mount, and distributor post guide slot to ensure precise oil pressure and distribution. The intake manifold is a Linkert-style four-bolt design with plumber-style nuts and brass studs, supporting the included M-74 Linkert carburetor, which is pre-run, installed, and shop-tested for optimal function.
Fitment: Harley-Davidson EL 1941–1947 and Harley-Davidson FL 1941–1947.
This engine kit ships fully assembled and ready to run, backed by a manufacturer's bill of sale.
Replica 74 inch long block Knucklehead with polished rocker boxes parkerized valve cover cups a Linkert 4 bolt manifold the motor sprocket and an 18mm sparking plug set. Fully assembled and tested for oil pressure.The Motorshop 74 Inch Knucklehead Engine Assembly offers a comprehensive solution for restoring or customizing vintage Harley Davidson EL and FL models from 1941 to 1947. Crafted with authentic cast iron profiles, this fully assembled engine is designed for ease of installation and reliable performance. The replica crankcases feature overhead oiler provisions from the timing cover, ensuring proper lubrication and vintage aesthetics. The engine includes polished rocker boxes and newly cast heads with parkerized lower valve cover cups and tops, adding durability and a classic look. Each component is assembled with stock rods and Torrington rollers with steel cages at the sprocket and pinion shaft ends, replicating original specifications for authenticity and strength. The valve train incorporates solid tappet assemblies with the Sifton Lightning cam, along with Sifton solid stock pushrods and chrome pushrod covers, providing a smooth and reliable operation. The cast iron cylinders are fitted with 8.5:1 pistons and Hastings rings for optimal compression and performance. An oil pump with a mechanical advance distributor, relay mount, and distributor post guide slot ensures precise oil pressure and distribution, critical for vintage engine operation. The intake manifold features a Linkert-style four-bolt design with plumber-style nuts and brass steals, supporting the included M-74 Linkert carburetor, which has been pre-run, installed, and shop tested for optimal function. This engine kit is shipped fully assembled and ready to run, backed by a manufacturer's bill of sale, making it an ideal choice for enthusiasts and restorers seeking authenticity and reliability in their vintage Harley Davidson rebuilds.
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