Yamaha Power Valve System. The thing that made the Yamaha RD350YPVS go like shit off a stick from about 6000rpm upwards.
Well, Brian, it's the YPVS that makes this bike so special.
by Ewan MacKenzie May 12, 2006
4 Words related to YPVS
RD350YPVS - 1980's 2 stroke sportsbike, successor of the LC and mighty fine in it's day.

Now collected by strange men with a passion for rooting in oily boxes at autojumbles.
He had a 'valve, but it shat itself.
Did you see that slapper - I nearly shat myself.
by Spar Racer January 15, 2004

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