Dyna EVO Motor

Engine and cam chest parts for the Evolution-powered Dyna. The Dyna arrived in 1991 and ran the Evo Big Twin until the Twin Cam took over in 1999, and this is the inside-the-motor page for those bikes.

What Is Here

V80 and V111 long blocks, Super Stock engine cases and heads, bolt-on and Monster big bore kits taking the Evo from 85 up through 109 cubic inches, camshafts, lifters, pushrods, valve springs, cam bearings, head bolts, cylinder studs, compression releases, forged roller rockers and billet oil pumps. Feuling and S&S Cycles carry most of it, with Revolution Performance and Custom Cycle Engineering alongside.

Why This Collection Is Split By Motor

Bolt-on parts go by platform. Engine parts go by cam chest. Two Harleys can wear the same badge, the same year, and still take different cams, plates, tensioners and oil pumps because the motor inside them changed. That is why the store keeps a separate page for each engine generation instead of listing everything under one platform.

The Evo Big Twin is shared architecture across Dyna, Softail, Touring and FXR, so parts here are usually listed as "Evo Big Twin" or "'84-'99" rather than by chassis. A few are cut at '92, which is where the engine cases changed.

Before You Order

Displacement, cam chest generation and whether the motor has been apart before all decide what you need. The fitment list on each product page carries the manufacturer's exact year and model coverage - read it, and if you are building rather than repairing, work out the whole combination before buying the first piece. Performance claims belong to the manufacturer; what any part is worth depends on the rest of your build.