Sprocket 13 teeth 20mm shaft : Elstar Products, Factory-tuned Racing Motorbikes ATV (Quad Bikes), aftersale support, spare parts and accessories. An agent for Apollo motorbikes, Orion, Elstar Motorbikes Shineray. High-quality parts by FastAce, Motul, RK, Ariete, Dynojet, NGK, Vee Rubber, Pro Taper. We carry all parts for Chinese motorbikes and pit bikes.