It's not uncommon to see pressure bleed one way and not the other, because of the nature of the labyrinth seal. In an ideal world it should hold full pressure both ways though.

White smoke from the RHS cylinder (I say cylinder, as on some models/systems the exhaust pipes can cross over) if often a failing RHS crank seal, and is drawing in a little transmission oil into the crankcase.

Unfortunately the centre seal is the biggest weakness of the later NSRs, and to make matters worse, seems to be affected even quicker than ever these days by modern fuels. It's probably OK for now, but expect to replace it in the not too distant future. But please keep us updated, as I'm only speaking from personal experience.
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Andy.
NSR-WORLD.COM

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