VideoPUP(TM) 42mm Air Filter Cleaner for 50cc-110cc Motorcycle ATV Dirt Pit Bike Go Kart Oval Metallic Clamp-on Refit Intake Funnel Silver It fits for most Chinese 50-110cc ATVs & Dirt Bikes &Pit Bike &Go Kart. May also fit some Japanese Style Higher air flow than normal filter for maximum power Race tested for performance and reliability Race filters increase air flow by up to 25% over standard filters