Who is the winningest motocross rider of all time?

Jeremy McGrath 85 winsRicky CARMICHAEL59James STEWART

55

these are combined lights (250/125)

and supercross (SX) wins (250-450)

7 supercross titles 72 SX wins 13 Lights wins (125cc)

by far , Mc Grath is the alltime King of supercross