JASO T903 and T904: What Motorcycle Oil Standards Actually Mean (2023 Update)
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🛠️ Mechanic Talk: If your clutch runs in oil (wet clutch), MB is a no-go. Use MA or MA2. MA2 gives you extra bite — especially under torque or heavy load.
If you're wondering about the difference between MA vs MA2 oil, it comes down to friction performance and clutch feel.
Choosing the right wet clutch oil rating helps avoid slippage under load.
JASO Oil Classification Chart – MA and MA2 are wet clutch safe. MB oils offer low friction but are not suitable for motorcycles with wet clutches.
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