I bought a brand new '69 125. Great bike, fast, light, more power than any other 125 available then.
Woodruff key holding the mag rotor on the shaft split repeatedly.
Condenser mounted under same rotor would overheat so if you stopped the bike on a hot day after a hard ride it would not start for an hour.
1997 Moto Guzzi 1100i Sport
2005 KTM 525 MXC (plated)
1960 Lotus 7 (hey, it's a 4 wheel motorcycle!)