My Gen 1 was great. Ivans jet kit, and a slip on. Mine made 136 rwhp. It did everything, from touring, to track days, to commuting. One thing to be aware of is the second gear issue. Mine lost second gear. On your test ride, if you can, make sure to take it to red line. Mine started jump out of gear around 8-9000rpms. Ended up being cheaper to replace the entire engine, than just the gears. My fz1 also had an ohlins piston kit done by traxxion dynamics and a penske rear shock. Had a magura front master cylinder and braided lines. Best brakes i've ever used. It was a rock solid, super dependable motorcycle. The only reason I got rid of it, was shear boredom.