Generic Motorcycle and Scooter Bearings

🧱 Generic Bearings for Motorcycles and Scooters – Overview

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🔩 1. Crankshaft Bearings (Bench)

Mounted at the ends of the crankshaft.

• Types:
  🔹 Ball bearings
  🔹 Roller bearings

• They often require specific seals (oil seals)

• They must withstand high temperatures and high rpm

Top brands : SKF, NTN, C4, FAG, Koyo

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🛞 2. Wheel Bearings (Hubs)

• Mounted in the front and rear wheel hub

• They must withstand radial and axial loads

• Watertight or shielded (ZZ, 2RS)

Common example :
🔧 6202 2RS → 50cc scooter wheel bearing

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⚙️ 3. Transmission / Gearbox Bearings

• Present in the gearboxes of motorcycles with gears

• Often on primary/secondary shafts and gears

• High precision, they must withstand constant loads

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🧩 4. Variator and Clutch Bearings (Scooter)

• Some scooters have bearings in the torque converter or clutch

• Also present in multivar and overrange systems

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🛠️ 5. Steering Bearings (Headsets / Fifth Wheels)

• Spherical or conical

• They allow the fork to rotate smoothly

• In kit with caps and grease

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🧰 6. Swingarm Bearings / Suspension Linkages

• On enduro, cross and sports motorcycles

• They must be resistant to dust, water, mud → sealed or dust-protected bearings

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🧪 How to choose the right bearing?

You need to know:

• 📌 Measurements (e.g. 15x35x11 mm)

• 🧾 Code (e.g. 6203 C3 2RS)

• 📍 Mounting position (wheel, bench, variator, etc.)

• 🚨 If it needs to be reinforced (racing) or is it for normal use

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🔧 Useful acronyms to know