MRELC 420 102 Links Chain & Heavy Duty Chain Roller Tensioner Combo for 50cc-140cc Dirt Bikes, Pit Bikes, ATVs, Go Karts - CRF50, XR50, PW80, SSR, Tao Tao, Coolster, Kazuma, Baja, Ice Bear, Lifan & More All-in-One Upgrade Solution:Elevate your dirt bike, pit bike, ATV, or go kart's performance with our ultimate combo package. It includes a high-quality 420 chain with 102 links and a heavy-duty chain roller tensioner, designed to fit a variety of models from 50cc to 140cc.