Keith Black KB263.070 74 Inch FLH-FX Piston Set .070 Oversize

Keith Black 390 hypereutectic piston set is .070 oversize and is for 3.438 inch bore. Pistons have a compression of 9.0:1.

The Keith Black KB263.070 74 inch FLH-FX Piston Set .070 Oversize is designed for applicable 1941–1950 Harley-Davidson FL models. This set is identified by part number KB263.070 and is supplied as a set for the specified application.

Proper break-in is important for new pistons and rings. Run the engine at moderate speeds for at least 500 miles while avoiding excessive operation in lower gears. Follow the piston installation guide provided by the supplier for installation information.

The set is listed with a country of origin of Mexico. Suggested item 11-1364 is an 80 inch Shovelhead Piston Ring Set .010. Accessory items include the Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, and accessory item 60-0167.

Features:

• Brand: Keith Black
• Part Number: KB263.070
• Application: 74 inch FLH-FX
• Oversize: .070
• Fitment: 1941–1950 Harley-Davidson FL
• Unit of Measure: Set
• Country of Origin: Mexico

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
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 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