The "motorcycle bearing" protection method makes it look new

**The "Motorcycle Bearing" Protection Method Keeps It Looking New** Home > Bearing Knowledge > "Motorcycle Bearing" Protection Method Makes It Look New *Created on 2018/5/16* var cpro_id = "u3440131";

The "Motorcycle Bearing" Protection Method Keeps It Looking New

Source: Bearing Network | Time: 2013-10-24

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
After the motorcycle engine has been used for a while, it's important to check the condition of the crankshaft. First, measure the axial play of the crankshaft using a dial gauge. The allowable limit is 0.05 mm. If this value is exceeded, it can cause abnormal vibrations that shorten the engine's lifespan and reduce performance. In such cases, the crankshaft should be repaired or replaced immediately. Next, inspect the motorcycle bearings. Start by cleaning the front bearing with solvent and then lubricating it with oil. Check if the inner race moves smoothly. If there is resistance or uneven movement, it could indicate issues like "kada, kada" noise. Examine the ball tracks and balls for signs of severe pitting, peeling, or cracking. If any damage is found, replace the bearing. Even if the bearing appears smooth and intact, but produces a loud "clattering" sound, it may be worn out. To test this, hold the inner and outer races and push them back and forth. If there’s noticeable play, the bearing should be replaced. Also, check the oil seal of the bearing. If it shows signs of wear, cracking, or hardening, it may lead to fuel or oil leakage. Replace the oil seal immediately to prevent further damage. Another key part to check is the big-end bearing of the connecting rod. When the connecting rod is removed, the big end should rotate smoothly. Fix one end of the crankshaft and pull the connecting rod to see if there's any unusual noise coming from the big end. The degree of wear can be estimated by observing the movement of the small end of the connecting rod. If the wear exceeds 3.0 mm, all related parts—connecting rod, crank pin, and bearing—should be repaired or replaced.
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