2012 Honda NC700X, one of the few I bought new. (This one was serial # 0096) I desperately wanted to love this little bike but I could not. The Frunk was cool for your helmet, awesome mileage, nimble and fun in traffic. The seat was like sitting on a fencepost (see I stuffed some foam in it.) and she was a gutless turd if you rolled on the throttle at 50. One of my few costly divorces
My old 2001 ZRX1200. Had Muzzy X-1 cams and the head ported on this one, in addition to the full titanium exhaust, carb work, etc. Increased it 39hp over stock (same dyno). It would stay dead even with my Busa through about 90mph, provided I could keep the front end just a few inches off the ground. I miss this the most of any bike I ever sold off. 1997 Yamaha YZF1000R, the "Thunderace as it was called in Europe. This was a 1 model year only bike in the US. The R1 came in next.
1995 Triumph Daytona 1200, the flagship bike when Triumph firsts returned to the US market. So many great rides and memories with this one, it's my 2nd most missed motorcycle.
My 2005 Hayabusa. All the good parts on it, made great power but by this time my back couldn't handle the riding position for more than 40 minutes. I regrettably sold it off. What I should have done, is considered making a streetfighter out of it or modifying the upper triple clamps and fairing to accept normal "Superbike" bend bars.
2005 Yamaha FZ1. A bike held in high regard by all the magazines back in the day, but compared to my ZRX1200, it was completely gutless and I resented it in a way. Great looking, but..