Keith Black KB263.050 74-Inch FLH-FX Piston Set .050 Oversize

Keith Black 390 hypereutectic piston set is .050 oversize and is for 3.438 inch bore. Pistons have a compression of 9.0:1.

The Keith Black KB263.050 74-inch FLH-FX Piston Set .050 Oversize is designed for the Harley-Davidson FL applications listed for model years 1941 through 1950. This piston set has a compression height of 1.450 inches and is supplied as a set.

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. Refer to the Keith Black piston installation guide for installation information.

The suggested 74-inch moly piston ring set .050 oversize is listed separately as part number 11-1373. Accessory items listed for this product include the Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, and item 60-0167.

Brand: Keith Black. Part number: KB263.050.

Features:

• Application: Fits 1941–1950 Harley-Davidson FL models listed in the product data
• Piston Type: 74-inch FLH-FX piston set
• Oversize: .050 oversize
• Compression Height: 1.450 inches
• Unit of Measure: Set
• Break-In Guidance: Run the engine at moderate speeds for at least 500 miles while avoiding excessive running in lower gears
• Suggested Item: 11-1373 - 74 inch Moly Piston Ring Set .050 Oversize

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