What are the symptoms of motorcycle engine bearing seizure?

[HopeAnn]

Motorcycle engine bearing seizure phenomenon may be caused by severe lack of lubrication oil during engine operation. Causes of motorcycle engine bearing seizure: Insufficient initial running-in of the engine, high-speed driving induced bearing seizure. For newly assembled engines, the seemingly smooth inner surface of the cylinder and the outer peripheral surfaces of the piston and piston rings are actually composed of countless micron-level uneven protrusions. Before the engine can truly operate freely, initial running-in of the mating surfaces must be performed to remove the protruding peaks, making the surfaces smooth and evenly stressed, preventing mutual biting during sliding, thus ensuring smooth operation. Repair methods for motorcycle engine bearing seizure: Inspect the engine and piston assembly for wear and piston assembly wear faults.