No power? 65hp? jeez what were you used to? back in 81 65hp was damn good for a 550, my 81Gpz550 made 60 or 62 and it was the fastest 550 around. Mate of mine had the yam I rode it a bit I called it the flexi flyer, went well but handled like crap.
My worst was prob the Yamaha XS250, now that was a gutless heavy POS