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.
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.
Here the compensating sprocket and clutch have been installed, and the primary chain has been tensioned.
Ironhead Engine Assembly Steps:
- Step 1 - Engine Case Assembly
- Step 2 - Oil Pump
- Step 3 - Cam Gears and Cover
- Step 4 - Installation of Primary Chain and Sprocket Wheels
- Step 5 - Fixing of the Compensating Sprocket
- Step 6 - Clutch Unit: Parts Cleaning and Preparations
- Step 7 - Clutch Release Disc: Installation Using Spring Compression Tool
- Step 8 - Startmotor: Cleaning and Inspection
- Step 9 - Startmotor and Bendix: Install and Test
- Step 10 - Primary Cover Back in Place
- Step 11 - Main Shaft Rollerbearing
- Step 12 - Oil Seal and Sprocket