Had one just like this, except it had a front drum. The motor broke and it sat in a shed at my parents for about 10 years. By the time I finally hauled it home the trans was froze and it had lots of corrosion to go with the mechanical problems. It was dumb of me to let it sit, but life got in the way. I thought I would restore it, but once I started estimating the cost I decided not too. As stated above, even doing most of the work yourself, it can cost a bunch of bucks to restore some of these old bikes. I eventually sold it to a guy in KC for $400. I delivered it to him and he had a garage full of GT750's and RD Yamahas in various states of repair. Before I left he insisted I take his restored '75 GT750 for a spin. Nice guy who really loved these bikes.