Normally "burned" valves has nothing to do with the oil.
The gasket on the oil cover is all part of the infamous "$2000 o-ring" problem.
Ther is a very good article on it by Snowbum, http://home.jps.net/%7Esnowbum/Oil.htm
If indeed you did have the gasket etc wrong, 3000 miles without a disaster is doing well, and if that is the way it WAS, then it's probably ok.
Work through the article and check it out carefully - ESPECIALLY noting YEARS of the problems. I do NOT belive yours is involved in the real problems - just have to make sure that yours is correctly assembled per factory specs.
Note that the bottom end on the airheads is almost indestructible - possible, but unlikely, UNLESS it ran out of oil pressure. You DID grab the rods and try to move them around when you had the cylinders off of course?
You can also pull the rods easily and have a look at the journals when the cylinders are off. Just be sure to replace the rod bolts and nuts.
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Grant Johnson
Seek, and ye shall find.
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One world, Two wheels.
www.HorizonsUnlimited.com
__________________
Grant Johnson
Seek, and ye shall find.
------------------------
Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
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