S&S Cycle 520 Camshaft for 1984-1999 Harley-Davidson Big Twins

S&S Cycle 520 Camshaft for 1984-1999 Harley-Davidson Big Twins

The S&S 520 camshaft is tuned for broad low-to-mid-range torque, giving Big Twin riders an engine that responds eagerly from idle through the everyday riding range. Whether navigating city streets or cruising at a steady pace on the highway, the 520 delivers steady, confident power where riders spend most of their time in the throttle.

Key Features

• Optimized for strong low-to-mid-range power from 1000 to 4500 rpm
• Ideal for 80ci to 96ci Big Twin engines up to 10:1 compression
• Compatible with hydraulic tappets
• Requires high-lift valve springs
• Made in the USA

Technical Specifications

• Lift: .520″
• Compatible Displacement: 80ci to 96ci
• Compression Range: Up to 10:1
• Power Range: 1000-4500 rpm
• Tappet Type: Hydraulic
• Spring Requirement: High-lift springs required

Fitment Notes

• Fits 1984-1999 Harley-Davidson Big Twin models
• Requires high-lift valve springs
• Verify coil bind, valve-to-valve clearance, valve-to-piston clearance, and cam lobe-to-case clearance
• Review the Fitment tab for complete year and model breakdown