X-PRO 35mm Air Filter for 50cc 70cc 90cc 110cc ATVs Dirt Bikes Go Karts Quad 4 Wheeler 35mm Air Filter. Top Quality Guaranteed. It fits 50-110cc ATVs & Dirt Bikes & Go Karts, such as Taotao and Coolster ATV's, Honda CRF50/ XR50, CRF70/ XR70 Pit Bikes and Thire copies Inside diameter: 35mm Higher air flow than normal filter for maximum power; Race tested for performance and reliability Please identify X-PRO NO. 1 China Motorcycle Parts Brand, Better Then OEM Parts.