1980 Suzuki GSX 750
This bike was a piece of work. Apparently the guy that owned it before me used to drag race it all the time - it had been slightly lowered, stretched, and stripped of weight. This GSX would do 100mph in the blink of an eye, but I didn't have the guts (or maybe I had the brains) to not try much faster. It also did 0-50 mph in about 3 1/2 seconds (with my friend on the back, counting!)
One day I was driving home from Grandy's and heard this clunking noise. Then when I looked down a rod poked out of the engine. That's not good. Turns out motorcycles need oil too. Learned another lesson that day.
The picture below is not of my actual bike, but mine looked almost identical.