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.

YPVS by Spar Racer January 15, 2004

YPVS 

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.

YPVS by Ewan MacKenzie May 24, 2006