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The V-Twin 10-1209 Knucklehead Engine Case Set is designed as a replacement for original cases on 1937–1946 Harley-Davidson EL models. Oil from the top end returns through the pushrod tubes rather than through the cylinder base. The case accepts loose roller bearings on the sprocket and pinion shaft sides.
This case set requires line lapping of the main case races. The case races should be line bored to 1.500 inches to accept standard rollers. The pinion and sprocket shaft races are not included. Use two gaskets when mounting the oil pump body for proper clearance.
The rear motor mount halves are stamped “7” to denote 74 cubic inches; builders may stamp these numbers in. The cam, distributor gear, breather gear, pump and bushing must be ordered separately. V-Twin SKU 10-1209 is supplied as a set.
Fitment: 1937 Harley-Davidson EL; 1938 Harley-Davidson EL; 1939 Harley-Davidson EL; 1940 Harley-Davidson EL; 1941 Harley-Davidson EL; 1942 Harley-Davidson EL; 1943 Harley-Davidson EL; 1944 Harley-Davidson EL; 1945 Harley-Davidson EL; 1946 Harley-Davidson EL.
Features:
- Replacement Design: Designed to replace the original cases.
- Oil Return: Oil from the top end returns through the pushrod tubes and does not return through the cylinder base.
- Bearing Compatibility: Accepts loose roller bearings on the sprocket and pinion shaft sides.
- Machining Requirement: Main case races require line lapping; line bore case races to 1.500 inches to accept standard rollers.
- Oil Pump Clearance: Use two gaskets when mounting the oil pump body for proper clearance.
- Race Details: Pinion and sprocket shaft races are not included.
- Separate Components Required: Cam, distributor gear, breather gear, pump and bushing must be ordered separately.
- Fitment: Fits 1937–1946 Harley-Davidson EL models.
- Unit of Measure: Set.
- Accessory Items: 10-1350 - Replica 74 inch Knucklehead Long Block Natural, 10-0945 - Knucklehead 74 inch Engine Case Set Natural, 10-0980 - Knucklehead Engine Case Set
Fitment:
Harley Davidson EL 1937
Harley Davidson EL 1938
Harley Davidson EL 1939
Harley Davidson EL 1940
Harley Davidson EL 1941
Harley Davidson EL 1942
Harley Davidson EL 1943
Harley Davidson EL 1944
Harley Davidson EL 1945
Harley Davidson EL 1946
Harley Davidson EL 1947
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
| UOM: SET |
| Country Of Origin: TAIWAN |
| Accessory Items: 10-1350 - Replica 74 inch Knucklehead Long Block Natural 10-0945 - Knucklehead 74 inch Engine Case Set Natural 10-0980 - Knucklehead Engine Case Set |
