Originally Posted by Deejay
I am puzzling as to why the belt goes from tight to loose when rotating the crankshaft. I would be looking to see if a shaft or pinion is bent or running out of true somewhere.

I assumed the belt had been damaged in certain places.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone