WORLD CHAMPIONSHIP won
with Zanzani rotors
CLASS 50cc
1978 RICARDO TORMO BULTACO
1979 EUGENIO LAZZARINI KREIDLER
1980 EUGENIO LAZZARINI KREIDLER
1981 RICARDO TORMO BULTACO
1982 STEFAN DOERFLINGER KRAUSER
1983 STEFAN DOERFLINGER KRAUSER
CLASS 80cc
1984 STEFAN DOERFLINGER KRAUSER
1985 STEFAN DOERFLINGER KRAUSER
1986 JORGE MARTINES DERBI
1987 JORGE MARTINES DERBI
1988 JORGE MARTINES DERBI
1989 MANUEL HERREROS DERBI
CLASS 125cc
1977 P.PAOLO BIANCHI MORBIDELLI
1978 EUGENIO LAZZARINI M.B.A
1979 EUGENIO LAZZARINI M.B.A
1980 P.PAOLO BIANCHI MORBIDELLI
1981 ANGEL NIETO MINARELLI
1982 ANGEL NIETO GARELLI
1983 ANGEL NIETO GARELLI
1984 ANGEL NIETO GARELLI
1985 FAUSTO GRESINI GARELLI
1987 FAUSTO GRESINI GARELLI
1988 JORGE MARTINES DERBI
1989 ALEX CRIVILLE COBAS
1992 ALESSANDRO GRAMIGNI APRILIA
CLASSE 250cc
1977 MARIO LEGA MORBIDELLI
CLASSE 350
1980 JON EKEROLD BIMOTA