Step By Step: How To Inspect, Lubricate, and Adjust a Motorcycle Chain

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.