James, gasket set, cylinder base. 3-5/8" bore. .020" RCM - 63-84 B.T. (excl. Evo) with 3-5/8" big bore cylinders (NU) 589654 Inner Primary Mainshaft BearingHigh-quality roller

Inner Primary Mainshaft BearingHigh-quality roller bearing comes with two retainer rings

This will enable installation of regular 1-3/4" diameter mufflers

One-piece heated seat with an ultra comfortable and extra large seating area for rider and passenger

Convex glass

James, gasket set, cylinder base. 3-5/8" bore. .020" RCM - 63-84 B.T. (excl. Evo) with 3-5/8" big bore cylinders (NU) 589654 Inner Primary Mainshaft BearingHigh-quality roller3 5 8" big bore. . 022" RCM (Rubber Coated Metal). Final crush . 020". RCM (Rubber Coated Metal) gaskets consists of a . 020" thick stainless spring steel base covered with a . 001" thick heat resistant Viton rubber on both sides. A very strong gasket which requires no re torquing. Gaskets will not become brittle or burn out.