Spitting Hunter

[R.Herman]

J.Coleman: I'd love to have an oil scraper ring - I have one, from Draganfly - but the ring land in my piston cannot accommodate it.
My valve guides are new, and while slightly looser than optimal, not enough to puke a lot of extra oil, I think.
I'm thinking again that perhaps due to using slippery oil the rings have not properly seated?

[nevhunter]

The inlet valve guide should have very little clearance. The exhaust about .003" and a good finish or the wear rate is High. 3 comp rings is OK. I have a W/NG with no oil rings and it Blows no smoke after 18,000 mikes of (fairly Hard) Use. Nev

[Roger Gwynn]

Sounds like it may be wet sumping given the amount of oil

[R.Herman]

Roger, it does sound like wet sumping indeed. I have twice removed the oil pump and made sure the scavenger side is working correctly, and it flows back to the oil tank as it should. I get a steady stream back to the tank, at least at first.
I just remembered something - the old Clymer manual mentions the need for integrity of a small gasket inside the timing cover that seals an oil passageway. I found no gasket at that spot and inserted one. Has not smoked since then, but I still get the oil film on the oil tank.
Maybe I need to just ride it and give up the idea of having oil-free clothing.

[Roger Gwynn]

Best waterproofing there is.

[R.Herman]

Oiled leather!

[R.Herman]

Does anyone think the lack of a check valve in my timing case breather could be a contributing factor in the oil pumping?

[nevhunter]

I wouldn't think so But your rings may not have seated yet. Get a few more miles on it. What size oil Pump is on it? Nev

[R.Herman]

Unseated rings are my suspicion as well. I don't know what size oil pump is on it, only that it is brass and aftermarket. I believe the passage - at least the supply side - is larger than the stock unit. I got the stock one with some spares when I got the bike, and if the replacement is pumping too much oil I could always put the stock one back on. I confess "too much oil" is not a problem I have run into in the past.

[Roger Gwynn]

Too much oil will not be a problem unless it is one of the geared Morgo pumps, standard plunger ones are OK.