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

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