S&S Cycle Evolution 640 Camshaft - 33-5108

Unleash the full potential of your high-performance engine with the S&S Cycle 640 Cam. This camshaft is engineered to deliver exceptional power and torque, making it the ideal upgrade for discerning riders and builders.

Description

The S&S Cycle 640 Cam is designed for large displacement engines of 110" and larger, with compression ratios between 10.5:1 and 11.5:1. It also excels in smaller 96"-107" engines with compression ratios from 11.0:1 to 12.0:1. With less overlap and fast ramps, this cam builds higher cylinder pressure for improved performance. The lower TDC lift simplifies installation, allowing for easier setup. Specifically designed for use with hydraulic tappets, the 640 Cam ensures smooth and reliable operation. Proudly made in the USA, this camshaft embodies S&S Cycle's commitment to quality and performance. Upgrade your engine with the S&S Cycle 640 Cam and experience the difference!

Features & highlights

• Optimized for large displacement engines (110"+) with 10.5:1 to 11.5:1 compression.
• Also suitable for 96"-107" engines with 11.0:1 to 12.0:1 compression.
• Fast ramp design builds higher cylinder pressure for increased power.
• Lower TDC lift simplifies the installation process.
• Designed for use with hydraulic tappets for smooth operation.
• Proudly made in the USA, ensuring top-quality craftsmanship.
• Experience enhanced performance and reliability with this premium camshaft.

Technical specifications

• Brand: S&S Cycle
• Product Name: Camshaft
• Type: Gear
• Grind: 640 Series
• Intake Open: 25°
• Intake Close: 60°
• Intake Duration: 265°
• Intake Lift: 0.640"
• Intake Lift at TDC: 0.222"
• Intake Lobe Centerline: 107.5°
• Exhaust Open: 65°
• Exhaust Close: 20°
• Exhaust Duration: 265°
• Exhaust Lift: 0.640"
• Exhaust Lift at TDC: 0.192"
• Exhaust Lobe Centerline: 112.5°

Important to know

The installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance, and cam lobe to case clearance. High-lift springs are required for proper installation and operation.