How to change chaind and sprockets on a YZ125 Dirtbike.
...sing teeth.Just follow these nine easy steps to keep from having serious problems. First, remove the cotter pin from the crown nut, also known as the axle nut, then remove the crown nut. Tap the axle out of the swing arm and remove the rear wheel. Lift the chain from the rear sprocket with an impact wrench, make sure you remove the sprocket bolts. After the above steps are completed, remove the sprocket. If you arn’t familiar with the yz125, these are the rear instructions. For the engine, remove the sprocket guard and lift the chain off the front sprocket. Now, your removal steps are completed. To reassemble the bike, reverse the above steps including a new chain and sprocket. Torque to specification and make sure you check the chain tension. If you have a tension prob...