Watercooled. The "elsie" was *the* pocket rocket. Have been thrashed without exception. Also likely crashed... But still Ok if they go, but be prepared to do a top end, bottom ends OK as long as it wasn't seized. The earlier RDs didn't have the YPVS (Yamaha Power Valve System), meaning bugger all below 7000rpm and everything above (which can cause exciting things to happen if you wind open the throttle suddenly!)

250cc

Yes