Chain and Sprocket Care
The key to good chain life is always having your chain adjusted properly and keeping it lubed. Whenever you install a new chain, you must replace the sprockets. When you have a new chain and new sprockets, they wear together. Replacing the whole drivetrain also allows you to get the most out of your chain and sprockets. Putting a new chain on a worn-out sprocket will wear out the chain immediately.
Similarly, a worn chain will ruin new sprockets. For all but the most-serious 125cc-class racers, replacing the standard chain with an O-ring chain will save a great deal of money. An O-ring chain lasts much longer, so it doesn’t wear out sprockets as quickly.
Whenever you install a new chain, make sure the master-link clip opening is facing the opposite way of the travel, so there is no chance of the clip hitting something and getting knocked off. If you ride in any mud, watch to see that the master-link clip doesn’t get worn. The clip can wear so thin it breaks!
Always make sure your chain is adjusted correctly and is lubed every time you head to the track. The best time to lube your chain at the track is right after you pull off. When the chain is still hot, it will allow the lube to flow inside the rollers and pins where it is needed most.
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