This chain is used on several karts with 6.5hp engines that are driven by adults without regard to the durability of the machines. They drove over dirt, dust, dirt, rocks, trees (unintentionally), trails and pavement. The chain and the links are not yet failed. I try to clean and oil them but I am sure this needs to be done more often than it is done. If that chain can move a 200-pound adult on a 30-year-old go-kart up hills for more than a summer without a breakdown or proper maintenance. it gets 5 stars from me. I fix cars for a living and this network has withstood some serious abuse.
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