MRELC Ultimate 420 120 links Chain & 420-13T& 35 Tooth Sprocket Set for 50cc to 170cc Dirt Bikes, ATVs, Go Karts, & Mini Bikes - CRF150, YZ80, SSR, Lifan, Coolster, & More! Complete Drivetrain Upgrade:Upgrade your dirt bike, ATV, go kart, or mini bike with this comprehensive 420 chain and sprocket set. Compatible with a wide range of engines from 50cc to 170cc, including popular models like CRF150, YZ80, SSR, Lifan, Coolster, and more. This set ensures smooth, efficient power transfer for an enhanced riding experience. Package includes: one 420-120 link chain, one 420-13T front sprocket (includes yellow spacer and 2 screws for installation), one 420-35T rear sprocket 35 teeth (includes 4 mounting screws), 12 spare chain buckles, one chain Breaker Engineered for Efficiency:The sprockets are precision-engineered to provide excellent chain grip, reducing friction and preventing premature chain wear. This helps drive efficiency and keeps your motorcycle chain stable and consistent as you ride, enhancing overall performance and prolonging the lifespan of your drivetrain components