2Lane,
This may be a little late to weigh in on this aging topic, but what the hell. A gearbox is a gearbox is a gearbox until you run into one with specific lubrication requirements. Most motorcycle transmissions are lubricated with engine oil. This works well in medium to high speed applications running indirectly lubricated needle bearings. My sense is that the bearing manufacturer has the last word on the lubrication requirements for this transmission.
From this end of the ether it’s hard to say precisely what caused the transmission to meltdown. I will say that I prefer a lightweight lubricant in a needle bearing equipped gearbox like this one.
Other than that, I’m thinking that those gears would make great limited edition CVO medallions. Just run a chain through the center and wear them around your neck. Now there is a gift for your favorite gear head!