Oil Pump Curiosity

[Striker1423]

I saw this on EBAY and I'm curious. I see there is little information on actual pump numbers available for these RD's. I mean, the parts inside them etc are shown, but YAMAHA left the entire pump assembly off the parts fiche's that I've found.

So, what is this pump: https://www.ebay.com/itm/124915803284

Are the bodies the same for the RD? What do you think he damaged when messing with it? I found it hard to tell.

[Arrow]

The gear inside has been damaged by attempting to fit it to an incompatible wormshaft. The numbers are just patent numbers. There are a few different types of castings, that need a different thrust washer arrangement for the wormshaft. Reinforced external webs on later castings too.

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[Striker1423]

I'm not buying it, but as far as pumps are concerned, what's been your experience with NOS pumps?  Are they worth it, or is it just a major expense for no real point? I.E. rebuild?

[Arrow]

It depends in what environment they've been kept in. Dirt ingress is a no no. Also I wouldn't trust any seal, over say 25 years old.

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