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superted
If I take the valve out, shake away any moisture and put it back in (without reapplying oil), the speed comes back for another 10 minutes before it slows down again. Same thing if I add oil. - Ted
It sounds like you are concentrating all your efforts on the valve piston itself. But that is not the only part affected by oiling your valves. Take a look in the valve casing and see if there is junk in there that could be gumming up your valve functionality. Give the insides of the tubes that the valves sit in and the valve caps a good cleaning too. Then when both parts (piston and casing) are good and clean, re-oil. See if that helps any.
- Sara
Baritone - 3 Valve, Compensating, JinBao JBBR1240