In order of owning:
1973 Dalesman 125 trials - wonder if it would be rideable in any of today's sections
1969 Bultaco sherpa 250 - sound bike with chrome Miller frame. Made everything easier to ride over than the Dalesman
1970 Bultaco Sherpa 250 - good bike, but felt long and heavy
1973 Montesa Cota 250 - never ran right, glad to get rid
1974 Ossa MAR 250 - inspiring bike
1977 Suzuki RL250 - smooth, electric-like motor, cycle parts a bit dodgy
1977 Yamaha TY175 - perhaps my favourite, had my best results on it, good for developing "attacking" skills
1978 Montesa Cota 348 - classic case of being overbiked I'm afraid
1979 Montesa Cota 250 - easy to ride, plenty of grip
1981 Fantic 200 - nice "tight" bike with good controllability
1982 Fantic 240 - good bike but could never make it grip as I should have
1987 Yamaha TY250 mono - very nice
1988 Yamaha TY250R mono - one of my very few brand new bikes, felt much more "taught" than the original, felt like a works rider for a while!
Had a break from trials from 1992 to 2005
Currently ride a Sherco 200, haven't tried any other modern stuff