riders 250cc (2-stroke) or 450cc (4-stroke) or greater. SCORE Sportsman MC < 250cc: Sportsman riders 250cc (2-stroke) or 450cc (4-stroke) or less. ATVs SCORE Class 21: Honda. SCORE Class 25: 251cc or more. See also Baja 500 Baja 400 Dust to Glory, the documentary about the 2003 race Mini-Baja Timerider References Fiolka, Marty (2005). 1000 Miles to Glory. Arizona: David Bull Publishing. . SCORE International (2006). "2006–2010 Off-Road Racing Rules and Regulations". SCORE International. "2009 New Classes & Existing Class Rule Amendments 2009 Baja 1000 Press Release Notes External links Official SCORE International website Official SCORE International Journal Official SCORE International Carbon TV channel 1967 Baja 1000 ( Twenty Seven Hours To La Paz – Video ) General description of 4-wheeled off-road classes. 1967 establishments in Mexico Auto races in Mexico Motorcycle races Off-road racing Rally raid races Recurring sporting events established in 1967 Sport in Baja California Sur Sports competitions in Baja California