I was on a run a while back, and a mate sidles up next to me and says “ya know that tranny you rebuilt for me last year, well I think the main seal has failed and I'm thinking about renaming the bike the Exon Valdez. I said lets go and have a look.
I got down amongst the dirt and leaves with a light. Hmmm? there's a lot of oil hanging from the oil tank and the starter motor is never going to rust...ever.
The good news is, I cant see any oil leaking from the gearbox seal. The bad news is that I think your oil tank is cracked.

We have another run in a couple of weeks so he delivered the bike here for me to inspect and fix the pesky oil leak. Removed the oil tank and cleaned it for inspection.

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Found the culprit. This picture is taken through the oil filter hole. The crack is 3/8” long and across the end of the factory weld that holds the bracket to the bottom of the oil tank.

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Crack runs under this bracket. How to get this done right?

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