so inspect them closely. A damaged or broken bearing can cause excessive
drivetrain noise by itself or it could be allowing gears to float and get out
of mesh, which could also be the cause of the noise. Sometimes bearing
failure creates a heat buildup that can warp the di; case, so inspect the di;
case to make sure the bearing seats are not being misshapen. Make sure
the di; gears are all intact and that the teeth have a smooth crown and
are not pointed. If the gears are pointed, they are worn out and need to be
replaced.
When you hear a drivetrain noise, find the cause and get it fixed before
it fails mid-run. Check the simple things first, and if necessary, rebuild the
drivetrain until the culprit is found.
