Budget-friendly, high-performance MX racing chain Designed specifically with local motocross champions in mind SDH pin technology means a longer chain life even on the most gruelling MX tracks Part description explanation: eg, 520DZ2 x 100 520 = chain pitch; DZ2 = chain model; x 100 = number of chain links (bike/sprocket specific – please check fitment charts or contact us); ZJ = connecting link style (ZJ = rivet link) We recommend all motorcycle parts are fitted and tested by qualified professionals. If you are unsure about the part choice for your bike, please contact us before purchase.