Ok, let me start off by saying that I have heard several people say that welding the cranks is a waste of time unless it is in a full race engine, big bore, etc.. Well I’ve been tearing down engines now for a few years, and have come across this more times than I can remember. This crank is just ONE example, but I’ve seen them come apart at the centers, rod pins, both, etc…
See how this rod pin isn’t near flush with the flywheel?
Another view to give you an idea of the depth of the pin.
And more welds of the pins. Just because I always think the colors are amazing!
Next time you have a charging issue, or have aluminum shavings you can’t figure out where they are coming from, look to the crank. The often most overlooked part of the XS650 engine could be the biggest thing waiting to go BOOM inside your engine.