S&S Cycle Rocker Boxes for 1966-84 Big Twin User Manual

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INTRODUCTION
S&S® billet rocker covers are two-piece style assemblies designed to fit most big twin shovelhead engines that accept style rocker covers.
S&S rocker covers are machined from billet aluminum, and then polished to a show quality finish. O-ring sealing insures reliable, leak free
operation.

NOTE: Plain, unpolished versions are available for custom applications. They may be powdercoated or otherwise finished to individual specifications. S&S
plain billet aluminum rocker covers must be inspected, and burrs and sharp edges carefully removed by customer before installation.

S&S rocker covers are designed to accept S&S, or stock rocker arms. In most instances, they will accept valve lifts to .590" without modification.

NOTE: It remains engine builder’s responsibility to check operating clearances. Clearances should be checked between valve spring/collar and rocker cover
base as well as between rocker arm and top rocker cover. S&S recommends minimum of .060". Cylinder head must also be set up for correct lift.

Failure to establish correct operating clearances can result in extensive engine damage not covered under warranty.
S&S rocker covers are compatible with both stock (external) and S&S (pushrod) upper end oiling.

NOTE: In certain circumstances, S&S rocker covers can be installed and removed without removing the head.

S&S tappets and tappet block components for shovelheads are 1984-1999 design.

INSTALLATION
1. Wash motorcycle, taking care to remove sand and other abrasive debris from engine and area of frame around engine. Remove battery, gas

tanks, and all parts required to access original rocker covers. Refer to authorized Harley-Davidson® Service Manual as necessary.

Sparks from motorcycle electrical system can ignite gasoline fumes. To prevent sparks as well as prevent electric starter from
becoming engaged inadvertently and causing personal injury, disconnect battery and remove from motorcycle before proceeding.
Gasoline is toxic if fumes are inhaled, extremely flammable, and explosive under certain conditions. Do not smoke around gasoline, and
perform installation in a well ventilated area away from sparks and open flame.

2. Remove pushrod cover retainer clips for front cylinder and collapse covers. Remove sparkplugs and rotate engine to place pushrods at lowest

point on cam with front piston at TDC on compression stroke. Remove head, rocker assembly, and pushrods, referring to Harley-Davidson®
Service Manual as necessary.

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CAUTION

WARNING