[SpudRider]

I'm pretty sure any 10W/40 motor oil does not contain friction inhibitors. Examine the bottle. If the following symbol is absent, the oil will work fine with your motorcycle's clutch.



People just beginning to do their own motorcycle maintenance always have questions regarding motor oil. Unfortunately, these questions usually lead to arguments on other forums, since many people have strong, entrenched opinions regarding this topic. However, we have a friendly group here, and we don't tolerate such arguments.

Choose any quality motor oil of the correct weight, either conventional or synthetic, and your engine will be well protected, as long as you change the oil regularly. Changing the oil regularly is more important than choosing a particular brand of motor oil. Of course, avoid any motor oil which has friction inhibitors, and bears the symbol shown above. Follow the CSC recommendations for oil changes during the break-in period, and you can't go wrong.

My personal preference is 15W/40 motor oil, but everyone should choose whatever motor oil he likes. If you are interested in learning more about motor oil, you might enjoy reading the following articles.

http://www.calsci.com/motorcycleinfo/Oils1.html
http://www.calsci.com/motorcycleinfo/Consumables.html