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Engine #5 - Primary Chain

Life's a bitch...   Thank God there's Harleys...

On this page you will find some pictures that T made during installation of the Primary Chain in our 1973 Harley Sportster Ironhead engine. The Harley Primary Chain connects the flywheel shaft with the transmission shaft of the Sportster Ironhead engine.


Sportster Primary Chain In Place

After cleaning all individual parts of the Primary Chain Drive assembly in our parts washer the primary chain was laid over the flywheel shaft sprocket and the transmission/clutch sprocket, and the whole assembly was lifted together and slid in place onto the flywheel shaft and the ingoing transmission shaft.

Photo of primary chain and sprocket wheels installed on our  1973 Ironhead Harley engine - by Harley Oldschool Bobber.


Sportster Primary Chain Connected

Once the primary chain together with the flywheel shaft sprocket and the transmission/clutch sprocket had been slid into place, the chain was connected to the flywheel shaft through the compensating sprocket and to the transmission shaft through the clutch.

Photo of primary chain and sprocket wheels installed on our  1973 Ironhead Harley engine - by Harley Oldschool Bobber. Here the compensating sprocket and clutch have been installed, and the primary chain has been tensioned.