Masahiro Shimizu

is a Japanese former professional Grand Prix motorcycle road racer.

Originally from Fujisawa, Kanagawa Prefecture, Shimizu won the 1987 250cc All Japan Road Race Championship. He began his Grand Prix career with a win in 1987. His best season was in 1991, when he finished fifth in the 250cc world championship, riding on a Honda.

Motorcycle Grand Prix Results Points system from 1969 to 1987: Position 1 2 3 4 5 6 7 8 9 10 Points 15 12 10 8 6 5 4 3 2 1 Points system from 1988 to 1992: Position 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Points 20 17 15 13 11 10 9 8 7 6 5 4 3 2 1

(key) (Races in bold indicate pole position; races in italics indicate fastest lap)

Year Class Team 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Points Rank Wins 1987 250cc Honda JPN4 ESP- GER- NAT- AUT- YUG- NED- FRA- GBR- SWE- CZE- RSM- POR- BRA9 ARG3 20 13th 0 1988 250cc Honda JPN- USA- ESP5 EXP2 NAT4 GERNC AUT6 NEDNC BELNC YUGNC FRANC GBR9 SWENC CZE13 BRA9 68 10th 0 1989 250cc Honda JPN13 AUS14 USA10 ESP7 NAT11 GER3 AUT10 YUG- NED11 BEL9 FRA7 GBR3 SWENC CZE2 BRA2 116 6th 0 1990 250cc Honda JPNNC USA11 ESPNC NAT8 GER6 AUTNC YUG12 NED4 BEL9 FRA4 GBR2 SWE3 CZENC HUNNC AUS8 100 7th 0 1991 250cc Honda JPN8 AUSNC USA5 ESP4 ITA7 GER5 AUT6 EUR6 NED6 FRA6 GBR4 RSM4 CZE4 VDM5 MALNC 142 5th 0 1992 250cc Honda JPNNC AUSNC MAL8 ESP3 ITA8 EURNC GER5 NED5 HUN4 FRANC GBR9 BRA13 RSA11 46 9th 0