4-1/4in. Stroke Flywheel Assembly. Fits 80ci Big Twins from 1973-1984.

Features & Benefits:-

* Can also be used to upgrade your 1200cc Engine 1973-1980 to 1340cc/80ci Engine.

Tech Tips:-

* Upgrading your 1200cc Engine 1973-1980 to 80ci/1340cc Engine requires the purchase of a 3-1/2" Bore Cylinder & Piston Kit # SS91-9023 & 1340cc/80ci Shovel cylinder base studs # CM-8857-8

* The 1340cc/80ci Cylinder base studs are slightly longer to compensate for the thicker cylinder base area of the 1340cc/80ci.

Proudly Made in the USA by S&S Cycle !