Oh man are those just cool little bikes. I had the CSR which was the cruiser model. The GPz came out right after I bought mine. I think they sold maybe 50 of those things total in the whole U.S. A real one year model. Ahead of its time, too small for what most folks wanted then.
I had a 305 as my first bike. My brother still has it, but it's sat so long, he's contemplating just seeling parts off it. It was fun, but I didn't love it, and parts are hard to come by. They sold it over in europe for a few years...