Crank gear supplier?

[Steve Jones]

The only way to selectively fit original gears that will, inevitably, have a degree of wear is to fit them and look for any tightness or excessive backlash. Any + or - markings on the gears and/or the crankcase are more than likely to have lost their relevance by now. Any tightness is an absolute no no as they'll destroy themselves in quick time once running.

I wish I could help you, Mark, but I'm down to my last, spare, crankshaft gear.

Steve