Tanacross Motorcycle Racing Class Rules & Technical Regulations

General Technical Requirements (All Classes)

• Front and rear brakes must be functional, properly bled with intact, non-sharp levers.
• No loose safety-critical items permitted.
• No active oil or coolant leaks. Non-glycol coolant preferred; OEM coolant acceptable.
• No sharp clip-ons, rearsets, or protruding components that may increase injury risk.
• Mirrors must be removed or disabled by folding and taping.
• Modifications are unlimited unless otherwise stated.
  
  • 250 Class
• Maximum displacement: 250cc
• Single or multi-cylinder machines up to 250cc
• Unlimited modifications within displacement limit.
  
  • 500 Class
• Maximum displacement: 500cc
• Singles or twins up to 500cc
• Unlimited modifications within displacement limit.
  
  • 600 Class
• 4-cylinder machines up to 600cc
• 3-cylinder (triple) machines up to 675cc
• Twin-cylinder machines up to 650cc
• Unlimited modifications within displacement limits.
  
  • 750 Class
• 4-cylinder machines up to 750cc
• 3-cylinder (triple) machines up to 765cc
• Twin-cylinder machines up to 800cc
• Unlimited modifications within displacement limits.
  
  • Open Class
• No displacement limits
• All configurations permitted
• Unlimited modifications subject to safety inspection.
  
  • Supermoto Class
• Supermoto or converted motocross/enduro machines
• No displacement limit unless stated in supplemental regulations
• Pavement-appropriate tires required
• Must meet all general technical requirements.