I bought one of these,used in 75.I took to a friend of mine who was a,Yamaha dealer at the time.He told me it was the worst bike Japan ever made and after he fixed it ,he never wanted to see it in his shop again..I never really had to many problems with it other than oil dripping on the points.It rode not bad for a bike of that period.It sounded great.Wish I had it today.