Keith Black KB263.030 74-Inch FLH-FX Piston Set .030 Oversize

Keith Black 390 hypereutectic piston set is .030 oversize and is for 3.438 inch bore. Pistons have a compression of 9.0:1.

The Keith Black KB263.030 74-inch FLH-FX Piston Set is a .030 oversize piston set for specified Harley-Davidson FL applications from 1941 through 1950. It is identified by part number KB263.030 and is supplied as a set.

Compatible applications listed for this product include 1941–1950 Harley-Davidson FL models. Verify engine specifications and required oversize before installation to ensure the piston set is appropriate for the application.

Keith Black recommends running the engine at moderate speeds for at least 500 miles during break-in, while avoiding excessive operation in lower gears, to properly break in new pistons and rings. Refer to the manufacturer's piston installation guide for installation information. A suggested 74-inch moly piston ring set .030 oversize and listed accessory tools are associated with this product.

Features:

• Brand: Keith Black
• Part Number: KB263.030
• Application: 74-inch FLH-FX piston set
• Oversize: .030 oversize
• Unit of Measure: Set
• Fitment: 1941–1950 Harley-Davidson FL models
• Break-In Guidance: Run the engine at moderate speeds for at least 500 miles and avoid excessive running in lower gears during break-in
• 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