How about a guy I had never met before, offering to let me race his 72 Kawasaki H1 500 triple in AHRMA Formula 500?
I took my first podium spot (3rd) in the first race on it! I took two 2nd place finishes on it, two more 3rd place finishes, two 5th place, and a 6th, to finish 3rd overall in season points. I only put the wheels in the grass ONE TIME after getting air with both tires flying over the hump at Grattan, MI, and I couldn't haul it down in time to make the hairpin; I did get right back on the track to finish 5th.
While I have ridden triples, it had been a long time since the last time, and the bike is set up for GP style shifting (down for all 5 gears), and the shifter is on the Left; I'm used to racing with my Bonny that is one down, three up, on the RIGHT side. Also, the Kwak didn't have any rear brakes (that's why I missed that hairpin), and I'm used to having one, although the drilled dual front discs can haul that sucker down pretty quick.
Anyway, I did manage to blow a cylinder liner on it after two-in-a-row 2nd place finishes at Miller Motorsports park, and ran the rest of the season on a swap meet bike engine (what are the odds you'd find a bike with a good engine at a swap meet at the race track where you were going to race next?). The owner of the bike blew the whole thing off saying 3 other people had raced it in the last 10 years and it was time for an overhaul anyway. The guy is of the best sort.
There are a lot more details of this season in the racing section, it was unbelievable.