Thanks Daniel. I'll go pull it apart now and have a look. However, with NO starting issues would this still be the most viable culprit?
Yep. Two contacts. When the button is pushed, one engages the starter relay, the other disconnects the headlight. On the standards and tourers there is no headlight relay, so the full current of the headlight (and extra lights if you hooked them to the headlight circuit with no relay) goes through there. The contacts tend to melt a bit into the plastic and get sticky.
Make sure they are free/springy...many have pulled it apart and cleaned but not freed up the springy-ness, and lube with diaelectric or white grease.
Most likely cause. Check the fuses too, but this is actually more likely.