The performance of the motorcycle bearing is: abnormal wheel noise, the wheel shakes around when riding, the weakness when going uphill, the driving is unstable, there is a lot of noise, it is easy to pull the cylinder, parts wear and so on.

Because there are many reasons involved, the text can not be specified, it is recommended to go to the 4s shop for maintenance.

Bearing is an important part of contemporary mechanical equipment, the main function is to support the mechanical rotation body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Bearings are classified into plain bearings, joint bearings, rolling bearings, deep groove ball bearings and angular contact ball bearings.

Motorcycle is a two-wheeled or three-wheeled vehicle driven by a gasoline engine and operated by a handlebar to steer the front wheel. It is widely used in patrol, passenger and cargo transportation, and is also used as sports equipment. Motorcycles are divided into street cars, road racing motorcycles, off-road motorcycles, cruise cars, station wagons and so on.

Motorcycle bearing broken reasons:

(1) The main bearing and connecting rod bearing are repeatedly ablated, the supporting force of the ablated part is weakened, and the fracture often occurs at the root of the 2 and 5 cylinder connecting rod journal (taking the six-cylinder machine as an example), the concentricity of the spindle neck and the correct warranty. There are many reasons for crankshaft damage, and the technical requirements are relatively high, so the crankshaft is very heavy in the engine, and the general fracture part is often between the spindle neck and the connecting rod journal.

(2) The clearance of adjacent main bearings is too large, especially the clearance between the last two main bearings and the first two main bearings is too large. Because the crank arm is relatively thin, there is a flywheel behind the crankshaft and a belt disc in front of the crankshaft, and the forces on both ends of the crankshaft are too heavy. The crankshaft also directly and indirectly drives other parts, such as camshafts. Coupled with the uneven load before and after the crankshaft, and the individual cylinder does not work, so that the crankshaft force is inconsistent, it can work millions of kilometers.