Boet van Dulmen
…Suzuki VEN SPA 11 AUT 8 FRA 21 NAT 9 NED 8 BEL Ret SWE 11 FIN 7 GBR Ret GER 8 13th 15 1979 500cc Suzuki VEN AUT NC GER Ret NAT Ret SPA 6 YUG 5 NED 4 BEL DNS SWE 3 FIN 1 GBR 5 FRA Ret 6th 50 1980 500cc Yamaha NAT Ret SPA 18 FRA 19 NED 4 BEL 9 FIN Ret GBR 16 GER Ret 14th 10 1981 500cc Yamaha AUT 5 GER 4…