Gaskets for Top End

Cometic Gasket Kits for Top End: Evolution Sportster

Include all gaskets for top end overhaul.

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James Gasket Kits for Top End: Evolution Sportster

Include all gaskets for top end overhaul.

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James Gasket Kits for Top End: XR 1200

Include all gaskets for top end overhaul.

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James Gasket Kits for Cylinder Heads and Base: Evolution 3-1/2” Bore

Including 2 MLS headgaskets 0,062" and 2 steel/silicone base gaskets

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Cometic Gasket Kits for Rocker Covers: Evolution Sportster

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James Gasket Kits for Rocker Covers: Evolution Sportster

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James Gasket Kits for Rocker Covers: XR 1200

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James Gaskets for Cylinder Head: Evolution 3 ” Bore

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James Gaskets for Cylinder Head: Evolution 3-11/32 ” Bore

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Cometic Gaskets for Cylinder Head: Evolution 3-1/2 ” Bore

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Gaskets OEM Replacement for Cylinder Base: Evolution 3-1/2 ” Bore

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James Gaskets for Cylinder Head: Evolution 3-1/2 ” Bore

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James Gaskets for Cylinder Base: Evolution 3-1/2” Bore

In 1983 the base gasket for the new Evolution cylinders was assigned the part# 16777-83, which was almost immediately replaced by 16777-83A. In 1986 the part# 16774-86 replaced the older 16777-83A gaskets and the part# 16777-83(A) disappeared from Harley litterature. The outline of the 16774-86 gasket underwent several changes during its span of use. But despite of the different outlines any of these gaskets fits a stock Evolution engine from 883 to 1340 cc.

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James Gaskets for Cylinder Base: Evolution 3-5/8 ” Bore

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S&S Gaskets for Cylinder Base: Evolution 4 ” Bore

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S&S Gaskets for Cylinder Base: Evolution 3-5/8 ” Bore

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James Gaskets for Rocker Covers: Big Twin 1984-1999 and Sportster 1986-2020, to Cylinder Head

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James Gaskets for Rocker Covers: Sportster 1986→, Lower

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James Gaskets for Rocker Covers: Sportster 1986→, Upper

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Cometic Gaskets for Rocker Covers: Sportster 1991-2006, Upper

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James Gaskets for Rocker Covers: Big Twin 1984-1999 and Sportster 1986→, Inner

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James Gaskets for Rocker Covers: Umbrella Valve

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Seal Washers for Rocker Cover Screws Sportster 2009-2020

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Seal Washers for S&S Rocker Cover Screws

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KPM Gaskets for Valve Stems

Valve guide are press fit on the valve guides. Due to the variety of stock and aftermarket valve guides it may be necessary to grind the guide for proper fitment.

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Manley Gaskets for Valve Stems

Made from high-temperature, low friction Viton material. Incorporate a spring-loaded wiper assembly for a long service life. Fir stock HD valve guides.

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Cometic Gaskets for Valve Stems

Made from high-temperature, low friction Viton material. Incorporate a spring-loaded wiper assembly for a long service life. Fir stock HD valve guides.

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