So far in the vintage stable, a Greeves 250 MX4 (first race bike), 1969 CZ 360 (my actual bike, in need of restoration, which I shared with my father in 1969 and then it became mine in 1970 when he purchased a 250), 1974 CZ400 (my actual bike now being restored) and Bultaco Mk7 360.
(The "modern" stable includes 00 Yam WRF400, 99 XR400 and 07 CRF450, but I just can't get used to the extra 2 strokes).
I am looking for 76 Honda CR 125, 76/77 Honda CR250 (an interesting story behind that one), a 78 Yamaha YZ400E, and a 1982 CR480.
Cheers