in some ways it was Grouch, it was one of the first yamaha road bike's to have monoshock suspension the motor is basically half of an xj motor
with YICS, in other ways it was old school as it was the last of the aircooled twins more's the pity! came out around the same time as the RD350 LC which was always the preferred choice of the boy racers of the day (KEV) I chose it over the rd because I always liked four strokes and the mpg was much better.