S&S Cycle 561 Camshaft for 1984-1999 Harley-Davidson Big Twins

S&S Cycle 561 Camshaft for 1984-1999 Harley-Davidson Big Twins

The S&S 561 camshaft is engineered for Big Twin riders who want a more aggressive power delivery in the midrange, producing the kind of strong pull from 3000 to 5500 rpm that makes passing feel effortless and spirited riding genuinely satisfying. The 561 strikes the right balance between streetable manners and real performance.

Key Features

• Strong midrange power output from 3000 to 5500 rpm
• Designed for 80ci to 96ci engines at 9.5:1 to 10.5:1 compression
• Compatible with hydraulic tappets
• Requires high-lift valve springs
• Spring spacing required during installation
• Made in the USA

Technical Specifications

• Lift: .561″
• Compatible Displacement: 80ci to 96ci
• Compression Range: 9.5:1 to 10.5:1
• Power Range: 3000-5500 rpm
• Tappet Type: Hydraulic
• Spring Requirement: High-lift springs required
• Installation Note: Spring spacing required

Fitment Notes

• Fits 1984-1999 Harley-Davidson Big Twin models
• Requires high-lift valve springs and spring spacers
• 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