As low as $63.99/mo with or . (Pay in 4 interest-free payments)
S&S CYCLE 640 Camshaft (Gear) – Evolution Big Twin ‘84–’99 Upgrade your street Evolution Big Twin with the S&S CYCLE 640 Cam , a precision gear-driven camshaft engineered to build strong cylinder pressure and responsive performance. Key Features Optimized for 110" engines and larger with 10.5:1 to 11.5:1 compression. Also fits 96"–107" engines with 11.0:1 to 12.0:1 compression. Less overlap with fast ramps for higher cylinder pressure. Lower TDC lift helps simplify installation. Designed for hydraulic tappets . Made in the USA by S&S CYCLE. Includes: Installer check required—coil bind, valve-to-valve clearance, valve-to-piston clearance, and cam lobe to case clearance. Requires high-lift springs . Specifications Type: Gear camshaft Grind / Series: 640 Series Riding Style: Street Intake: Close 60°, Open 25°, Duration 265°, Lift 0.640" (Intake at TDC 0.222"), Lobe Centerline 107.5° Exhaust: Open 65°, Close 20°, Duration 265°, Lift 0.640" (Exhaust at TDC 0.192"), Lobe Centerline 112.5° Weight: 1.95 lbs | Dimensions: 5.9" x 3.38" x 3.18" | Units: Each
For large displacement engines 110" and larger with 10.5:1 to 11.5:1 compression and smaller engines, 96"-107" with 11.0:1 to 12.0:1 compression
Less overlap and fast ramps build higher cylinder pressure
Lower TDC lift makes installation easier
Designed for use with hydraulic tappets
Made in the USA
Installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe to case clearance.
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