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What is the size of the shock absorber oil seal for a 125cc motorcycle?

2 Answers

GenesisAnn

07/30/25 1:06am

The size of the shock absorber oil seal is 30*40.5*10.5. Below is relevant information about oil seals: 1. Cause of the issue: The primary factor leading to oil leakage is the poor sealing of the oil seal. When the shaft wears and forms grooves, even replacing the oil seal with a new one fails to seal properly. This occurs because the contact pressure between the oil seal lip and the shaft decreases, resulting in insufficient interference between the oil seal lip diameter and the shaft diameter after installation. 2. Functions and applications: Engine: Crankshaft—front and rear crankshaft oil seals; Valve—valve oil seal (engine repair kit O-ring) (distributor oil seal, water pump oil seal, balance shaft oil seal, oil pump oil seal...); Camshaft—camshaft oil seal; Transmission: Transmission—front and rear transmission oil seals, shift lever oil seal (transmission repair kit O-ring) (transfer case—front and rear transfer case oil seals); Rear axle: Half shaft—rear half shaft oil seal; Differential—front and rear angular contact oil seals, rear wheel oil seal, front wheel oil seal, steering gear oil seal (steering gear repair kit O-ring), steering booster oil seal (front half shaft oil seal).

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OKylie

08/15/25 6:37am

I've been riding a 125cc motorcycle for several years, and the model of the shock absorber oil seal isn't fixed—it really depends on which specific model your bike is. For example, Yamaha and Honda's 125 models have different shock absorber designs, so the oil seal sizes vary. Last time I repaired my bike, I first checked the part number in the vehicle manual, then matched and purchased it online. If you don't have the manual, you can remove the old oil seal to check the numbers printed on the side or take a photo and ask the dealership. Remember, oil seal aging can cause shock absorber leaks, affecting riding stability, so I recommend regular checks—don't wait until it's completely broken to replace it. Safety first.

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