The Epic continues...Opinions on the oil pump?

[randy]

As many of you have read, what began as a starter clutch fix has morphed into a complete going-through. I've sorted out the bearing conundrum, thanks for all the input everyone. My rebuild epic continues...and I really don't like the looks of this...



Opinions?

[petejw]

hey randy,

bit hard to tell by the pic but if those score marks are deep enough and allow the oil to bypass the pump,
then i think you might need to replace it.

if there not too deep, you might be able to rub it back a bit.

[randy]

That was my opinion, too, Pete. I COULD reface the cover and the outer rotor, but can't do anything with the inner rotor nor the inner housing. It has similar gouges. The clearance between the inner / outer rotor is OK, though.

[petejw]

it was the score marks on the inner and outer rotor
that would have me worried, i could see where oil could
leak past. being that youve replaced the bearings and all,
i wouldnt take the risk in using it.

how did u go with the bearings,
which ones did u end up using?

i wonder what you picked up to cause that,
did u find anything in the oil?

[red bandit]

Any idea what kind of oil pressure you used to have?

[petejw]

...........

[trbig]

Randy,

Ya know, I've never actually taken one of the oil pumps apart. I could take a look and see if they all have that scoring. If they don't, I could send you one of you need it. I've got one or two.. or ten laying around here.


Tod

[andreashweiss]

I have taken lots of those oil pumps apart and have to agree that thing should be scrapped out, looks used up, never seen one worn out like that, Yamaha built a good solid oil pump, it has had it, do not use it, find another one, sorry I do not have any , thanx andreas

[trbig]

Andreas.. that's surprising! I figured that would be one of those things you'd have 50 of.. lol.


Tod