What weirht of oil to use in a 1999 kawasaki 1500 vulcan classic?

For a 1999 Kawasaki 1500 Vulcan Classic, it's recommended to use a high-quality 10W-40 motorcycle oil, which is suitable for both the engine and transmission. Make sure to use oil that meets or exceeds the JASO MA or MA2 specifications for optimal performance and protection. Always check your owner's manual for specific recommendations and any updates.