This 640 is for 1984-1999 Harley-Davidson® big twin models with large displacement motors with compression ratios of 10.5 - 11.5:1 or smaller motors with 11:1 - 12:1 compression ratio, does not require as much compression as the 631. For hydraulic tappet, spring spacing is required.
Key Features
Brand Manufactured by S&S Cycle
Category Engine Components
Type Camshafts
Specifications
Length 6.13 in
Width 3.25 in
Height 3.25 in
Weight 1.95 lbs
Rider Benefits
This 640 is for 1984-1999 Harley-Davidson® big twin models with large displacement motors with compression ratios of 10.5 - 11.5:1 or smaller motors with 11:1 - 12:1 compression ratio, does not require as much compression as the 631. For hydraulic tappet, spring spacing is required.
This camshaft IS also for 1954-1984 big twins with either the Hydraulic Conversion kit or the Cylinder Head Replacement kit for panhead engines
Please review manufacturer details to ensure proper fitment before ordering.