What engine sizes and compression ratios is this camshaft best suited for?

This S&S 561 camshaft is recommended for engines between 88 and 96 cubic inches. It performs best with a compression ratio ranging from 9.5:1 to 10.5:1, providing strong midrange power.

What other components are needed for installation?

For proper installation, this camshaft requires the use of hydraulic tappets and appropriate spring spacing. Ensure these components are in good condition or plan for their replacement.

Does this camshaft fit all Harley-Davidson Big Twin models from 1984-1999?

This camshaft fits a broad range of Harley-Davidson Big Twin models within the 1984-1999 model years. It is compatible with various Electra Glide, Softail, and Dyna models, among others.

S&S Cycle 561 Camshaft 33-5076 - Harley-Davidson Big Twin

Name: S&S Cycle 84-99 BT 561 Camshaft
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-84-99-bt-561-camshaft-t14-619287
Price: 255.95 USD
Availability: BackOrder

S&S Cycle 84-99 BT 561 Camshaft

$255.95

On Backorder — Expected to ship by May 7, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

S&S Cycle 84-99 BT 561 Camshaft

Key Features

Fits 1984-1999 Harley-Davidson Big Twin models.
Recommended for 88 to 96 cubic inch engines.
Designed for 9.5:1 to 10.5:1 compression ratios.
Provides strong midrange power.
Optimized for operation between 3000 and 5500 RPM.
Requires hydraulic tappets and spring spacing for installation.

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Will this fit your vehicle?

Product Details

This S&S Cycle 561 camshaft is built for 1984 through 1999 Harley-Davidson Big Twin models. It's a well-built component designed to give your engine a noticeable boost in midrange power, typically operating best between 3000 and 5500 RPM. This cam is recommended for engines ranging from 88 to 96 cubic inches, especially when paired with a compression ratio between 9.5:1 and 10.5:1.

When you're looking to improve the performance of your Harley-Davidson, a camshaft upgrade like this one can make a significant difference. The S&S 561 is known for providing strong midrange torque, which translates to better acceleration and pulling power when you need it most. Keep in mind that this camshaft requires hydraulic tappets and proper spring spacing for installation, so be sure to have those components ready or plan for their replacement.

This camshaft fits a wide range of Harley-Davidson models, including popular bikes like the Electra Glide Classic, Heritage Softail Classic, and Dyna Super Glide. It's a solid option for riders who want to feel more responsive power from their engine without sacrificing everyday usability.