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Inspect Your Motorcycle's Sprockets
Inspect the sprocket for wear closely; the shape of the teeth will tell a lot about how the bike was ridden and maintained.
© Basem Wasef
Front and rear sprocket teeth are good indicators of maladjusted chains; inspect the teeth to make sure they are meshing well with the chain. If the sides of the teeth are worn, chance are they haven't been seating well with the chain (which probably shows corresponding wear.) Wave-shaped teeth wear is another irregularity that might suggest that you need new sprockets.