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Make sure it's JASO MA certified and not JASO MB certified. JASO MB isn't suitable for wet clutch use. Here are a few articles to read. The source link is listed above each excerpt.
SOURCE
The Japanese Automotive Standards Organization (JASO) has created their own set of performance and quality standards for petrol engines of Japanese origin.
For 4-stroke gasoline engines, the JASO T904 standard is used, and is particularly relevant to motorcycle engines. The JASO T904-MA and MA2 standards are designed to distinguish oils that are approved for wet clutch use, and the JASO T904-MB standard is not suitable for wet clutch use.
For 2-stroke gasoline engines, the JASO M345 (FA, FB, FC) standard is used, and this refers particularly to low ash, lubricity, detergency, low smoke and exhaust blocking.
These standards, especially JASO-MA and JASO-FC, are designed to address oil-requirement issues not addressed by the API service categories.
SOURCE
JASO MA
Japanese standard for special oil which can be used in 4-stroke motorcycle engine with one oilsystem for engine, gearbox and wet clutchsystem. Fluid is non-friction modified.
JASO MB
MB grade oils are classified as the lowest friction oils among motorcycle four-cycle oils. Not to be used where a JASO MA grade oil is required.
SOURCE
All quality motorcycle specific oils should also carry the JASO Motorcycle Specifications, which are either the JASO-MA specification (no friction modifiers) or the JASO-MB specification (with friction modifiers).
Another good link to read:
ThumperFaq: 4-Stroke Oil
SOURCE
The Japanese Automotive Standards Organization (JASO) has created their own set of performance and quality standards for petrol engines of Japanese origin.
For 4-stroke gasoline engines, the JASO T904 standard is used, and is particularly relevant to motorcycle engines. The JASO T904-MA and MA2 standards are designed to distinguish oils that are approved for wet clutch use, and the JASO T904-MB standard is not suitable for wet clutch use.
For 2-stroke gasoline engines, the JASO M345 (FA, FB, FC) standard is used, and this refers particularly to low ash, lubricity, detergency, low smoke and exhaust blocking.
These standards, especially JASO-MA and JASO-FC, are designed to address oil-requirement issues not addressed by the API service categories.
SOURCE
JASO MA
Japanese standard for special oil which can be used in 4-stroke motorcycle engine with one oilsystem for engine, gearbox and wet clutchsystem. Fluid is non-friction modified.
JASO MB
MB grade oils are classified as the lowest friction oils among motorcycle four-cycle oils. Not to be used where a JASO MA grade oil is required.
SOURCE
All quality motorcycle specific oils should also carry the JASO Motorcycle Specifications, which are either the JASO-MA specification (no friction modifiers) or the JASO-MB specification (with friction modifiers).
Another good link to read:
ThumperFaq: 4-Stroke Oil