S&S CYCLE Camshaft - 640 Series - Evolution Big Twin '84-'99

Features

• 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

Notes

• Installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe to case clearance.
• Requires high-lift springs.

DISCLAIMER: Not legal for sale or use in California on any pollution controlled motor vehicles.

Specs

Product Name	Camshaft
Type	Gear
Application	Exhaust / Intake
Grind	640 Series
Intake Lift	0.640"
Intake Open	25°
Intake Close	60°
Intake Duration	265°
Intake Lift at TDC	0.222"
Intake Lobe Centerline	107.5°
Exhaust Lift	0.640"
Exhaust Open	65°
Exhaust Close	20°
Exhaust Duration	265°
Exhaust Lift at TDC	0.192"
Exhaust Lobe Centerline	112.5"
Units	Each
Riding Style	Street