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The Motorshop E-840-010 3-5/8 in. Piston Set .010 Oversize is designed for 4-1/2 in. stroke flywheels. The finished bore size should be 3.8750 in. to fit 3-5/8 in. cylinders.
This kit fits 1948–1957 Harley-Davidson FL models, including 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, and 1957 applications. Verify the listed fitment and required bore size before installation.
After installation, run the engine at moderate speeds for at least 500 miles and avoid excessive running in lower gears to properly break in the new pistons and rings. The Motorshop E-840-010 is supplied as a kit and has a country of origin of Taiwan.
Features:
- Application: For 4-1/2 in. stroke flywheels
- Bore Requirement: Finished bore size should be 3.8750 in. to fit 3-5/8 in. cylinders
- Oversize: .010 oversize
- Fitment: 1948–1957 Harley-Davidson FL models
- Unit of Measure: Kit
- Country of Origin: Taiwan
- Break-In Guidance: Run the engine at moderate speeds for at least 500 miles and avoid excessive running in lower gears
- Accessory Items: 10-1139 - Panhead Cylinder Heads 3-5/8 inch Big Bore, 11-0380 - 3-5/8 inch Cylinder Set, 10-1086 - Panhead Cylinder Heads 3-5/8 inch Big Bore
Fitment:
Harley Davidson FL 1948
Harley Davidson FL 1949
Harley Davidson FL 1950
Harley Davidson FL 1951
Harley Davidson FL 1952
Harley Davidson FL 1953
Harley Davidson FL 1954
Harley Davidson FL 1955
Harley Davidson FL 1956
Harley Davidson FL 1957
Harley Davidson FL 1958
Harley Davidson FL 1959
Harley Davidson FL 1960
Harley Davidson FL 1961
Harley Davidson FL 1962
Harley Davidson FL 1963
Harley Davidson FL 1964
Harley Davidson FL 1965
Harley Davidson FL 1966
Harley Davidson FL 1967
Harley Davidson FL 1968
Harley Davidson FL 1969
Harley Davidson FL 1970
Harley Davidson FL 1971
Harley Davidson FL 1972
Harley Davidson FL 1973
Harley Davidson FL 1974
Harley Davidson FL 1975
Harley Davidson FL 1976
Harley Davidson FL 1977
Harley Davidson FL 1978
Harley Davidson FL 1979
Harley Davidson FL 1980
Harley Davidson FL 1981
Harley Davidson FL 1982
Harley Davidson FL 1983
Harley Davidson FL 1984
Harley Davidson FLT 1979
Harley Davidson FLT 1980
Harley Davidson FLT 1981
Harley Davidson FLT 1982
Harley Davidson FLT 1983
Harley Davidson FX 1971
Harley Davidson FX 1972
Harley Davidson FX 1973
Harley Davidson FX 1974
Harley Davidson FX 1975
Harley Davidson FX 1976
Harley Davidson FX 1977
Harley Davidson FX 1978
Harley Davidson FX 1979
Harley Davidson FX 1980
Harley Davidson FX 1981
Harley Davidson FX 1982
Harley Davidson FX 1983
Harley Davidson FX 1984
Harley Davidson FXR 1982
Harley Davidson FXR 1983
| UOM: KIT |
| Country Of Origin: TAIWAN |
| Suggested Items: 11-0197 - 3-5/8 inch Shovelhead Piston Ring Set .010 Oversize |
| Accessory Items: 10-1139 - Panhead Cylinder Heads 3-5/8 inch Big Bore 11-0380 - 3-5/8 inch Cylinder Set 10-1086 - Panhead Cylinder Heads 3-5/8 inch Big Bore |
