Product Details

551 cams are bolt-in cams. Cams that exceed the limits of the stock valve springs require the use of special high lift springs. Most S&S cams have higher lift than stock and are designed to take advantage of the extra flow of ported stock heads or S&S Super Stock heads. Due to the high lift of these cams, S&S adjustable pushrods are recommended. Not all grinds are available in the chain drive version. To get the best performance from a performance cam installation, a high flow intake and exhaust system is also recommended.

Designed for engines with 96 to 106 CID and 9:1 to 9:9 compression this is a bolt-in cam set designed for stock or mildly modified touring bikes. 551 cams are not recommended for compression ratios of 10:1 or greater. Greatly improves low-end and midrange torque, strongest from idle-4000 rpm.

Quick installation and Easy Start Cams allow stock starter to start any engine.

Kit contains cams, gear cover gasket, cam bearings, and instructions.

NOTE: 2001-2004 models require special valve springs (sold separately), 2005-2006 models can reuse stock.

Fit Guide

Model

551 Easy Start Chain Drive Kit

Valve Lift

.550"

Intake Lift

.178"

Exhaust Lift

.170"

Intake Duration

216 degrees

Exhaust Duration

238 degrees

Intake Lobe Center

91 degrees

Exhaust Lobe Center

102 degrees

Intake Timing (Open)

17 degrees

Exhaust Timing (Open)

41 degrees

Intake Timing (Close)

19 degrees

Exhaust Timing (Close)

17 degrees

Product Fitment

This item fits the following applications: