The sprocket is heat-fitted onto the outer edge of the flywheel, then secured in place after cooling, to mesh with the starter gear, rotate the crankshaft, and start the engine.

1) When starting the engine, the starter gear may collide with the flywheel teeth ring, or the teeth may not mesh properly, resulting in damage to the teeth ring.

2) The starter's power connection was too early, causing the starter gear to collide with the flywheel tooth ring.