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Big Bore Kits - Engine

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CYLINDERS FOR 1988-2003 SPORTSTER EVOLUTION 1200cc MODELS

$189.99
Our replacement aluminum cylinders feature cast iron sleeves for excellent wear and heat dissipation. Bored for standard 80" or 1200cc pistons. Final honing is required. Fits front and rear on Evolution® engines listed.

Sold each without piston.

Fits:1988-2003 XL 1200

CHOOSE NATURAL OR BLACK FINISH Learn More

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KIBBLEWHITE 883 to 1200 CONVERSION VALVES

$42.99
Black Diamond® Conversion Valves for Evolution® Sportster® Models: Use these Black Diamond® valves when converting your Evolution® 883cc Sportster® model to 1200cc. Get all the benefits of high-tech, high-quality valves.

Sold each. Learn More

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MANLEY ’SEVERE DUTY®’ STAINLESS STEEL VALVES

$75.99
Designed to outflow stock valves. Manufactured from high temperature materials with swirl polish and performance oriented shapes. Feature choice of chrome or nitride finished stems to eliminate galling. Impervious to heat and unleaded fuels.

Sold in pairs.

Also Available.....
For Evolution Sportster 883cc to 1200cc Conversion: To fully benefit from 883cc to 1200cc conversions, you need to install larger valves. These 1.48" exhaust and 1.715" intake valves from 1200cc Sportster® models are .060"-shorterthan- stock for the 883cc heads. Forged onepiece stainless steel with chrome stems and hardened tips. Learn More

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S&S ROCKER ARM Kit For 1986-2003 Sportster

$465.99
Sold As Set of 4...

Includes Replacement set of 4 rocker shafts - ($31.00 if purchased seperate from anyone else)


These hardened aircraft steel rockers have pressed in bushings for durability and hte highes wear resistance possible.

Fits cam lifts up to .065" and designed for use with adjustable pushrods to obtain correct valve lash adjustment. S&S recommends new rocker arm shafts for maximum performance and mileage and Sportster Specialty has included thes in this kit. Learn More

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