S&S Cycle

1984–'99 big twins

1984–1999 Evolution ® 1926–1984 Vintage Engines Tools & Shop Supplies Warranty & Company Policy Appendix & Index

BILLET AND DIE-CAST ROCKER COVERS GLOSS BLACK NOW AVAILABLE! FITMENT • 1984–‘99 big twins • S&S 41/8" Bore FEATURES AND BENEFITS • OEM-style "umbrella" fittings are included with billet rocker boxes for 1993–’99 big twin engines with cylinder head venting. • Cast rocker boxes use an exclusive one way valve, which is built into the rocker cover gasket to control oil carry over in "head breathing" engines.

90-4110 ±

• S&S billet rocker covers are available in two finishes: show quality chrome or unfinished. Unfinished is ideal for powder coating and other custom cosmetic treatments. Die-cast covers are available in chrome adn gloss black finish. • Installation on stock and most comparable sized engines can be performed without removing the engine from the frame. KIT CONTENTS • 2 covers • All necessary gaskets, o-rings, and mounting hardware

DIE-CAST ROCKER COVER KITS & REPLACEMENT GASKET KIT Application Description

Part #

90-4095 90-4091 900-0937 90-4110 ± 90-4111 ±

Chrome Die-Cast Rocker Cover Kit USA 1,2

1984–’99 big twins

Replacement Gasket Kit

Gloss Black Die-Cast Rocker Cover Kit

S&S 41/8" Bore Engines

Chrome Die-Cast Rocker Cover Kit

Replacement Gasket Kit

± WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

BILLET ROCKER COVER KITS & REPLACEMENT GASKET KIT Description Part # Chrome Billet Rocker Cover Kit 90-4050 ± Unfinished Billet Rocker Cover Kit 90-4055 Replacement Gasket Kit 90-4049

± WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

S&S billet rocker covers

REPLACEMENT PARTS: SEE PAGE 86 & 87

NOTES: In spite of the similarities between different S&S billet and cast rocker covers, not all parts are interchangeable. See PAGE 86 & PAGE 87 for correct Part #s. The performance-oriented design of the billet rocker boxes permits valve lifts up to .710" with stock or S&S Super Stock® heads, and up to .810" with S&S Special Application heads. S&S roller rocker arms are recommended for high lift cams. Cast rocker boxes may require some minor clearancing, and it is recommended that they be ordered either polished or unfinished, so that clearancing may be done without disturbing chrome plated surfaces. S&S billet rocker covers accept valve springs up to 1.660" O.D. without modification. Cast rocker boxes may require minor clearancing. Cylinder heads must be set up correctly for high-lift cams, and it remains the builder’s responsibility to confirm all clearances. Kits include front and rear cover assemblies with base and top cover, rocker shaft supports, gaskets and o-rings, and instructions.

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