Roger De Coster (born 28 August 1944) is a Belgian former professional motocross racer and current Motorsport Director of KTM and Husqvarna North America...

De Coster or Decoster is a Dutch occupational surname, most common in Flanders. Coster is an archaic spelling of modern Dutch "koster" (parish clerk)....

championships. During the 1970s, Mikkola challenged perennial champion Roger De Coster for supremacy of the 500cc motocross world championships. After 12...

championship in a season-long battle with four-time world champion Roger De Coster that wasn't decided until the final Grand Prix of the season. The 250cc...

Suzuki's Roger De Coster and Husqvarna's Heikki Mikkola were once again the two top competitors in the chase for the 500cc motocross world championship. De Coster...

Championship was the 17th F.I.M. Motocross Racing World Championship season. Roger De Coster won his third consecutive 500cc world championship for Suzuki ahead...

his old rivalry with Suzuki's Roger De Coster. Mikkola won 12 motos to clinch the title ahead of Suzuki teammates De Coster and Gerrit Wolsink. Brad Lackey...

championship of motocross racing, organized by the Fédération Internationale de Motocyclisme (FIM), divided into two distinct classes: MXGP and MX2. Race...

500cc classes in just one season. Hannah capped off the year by giving Roger De Coster his strongest American challenge to date in the 1977 Trans-AMA series...

teammates of Joel Robert and Roger De Coster didn't join the event until the fifth race of the series, but made an impact with De Coster posting three overall...