Yamaha FS1-M (restricted one) - zzzzzzzzzzzzzzzzzzzzz
Suzuki TS100 - good fun
Suzuki GS550E - ragged it rotten and it never let me down
Yamaha RD250LC - The best bike in the world, EVER!! I want another one.
CZ 175 - Never really worked
Yamaha DT175 - built from a box of bits
Honda C70 ............. Classic fun!
Kawasaki Z550 - another 'project', ended up giving it away.
Presently, Harley XL53C - Painful, but fun.