From their website:
Blended with Pennsylvania Grade base oil, select synthetic components and superior additive chemistry, this high performance SAE 10W-40 Motorcycle Oil offers the ultimate in quality, performance and protection for motorcycles. Meets JASO MA-2 performance requirements for use in wet clutches. Suitable for use in Honda®, Kawasaki®, Suzuki®, Yamaha® and other 4-stroke motorcycles where an API SJ, SH or SG quality oil is specified. May also be used in ATV’s, golf carts, 4-wheelers and other 4-stroke engine applications. Always consult your owner’s manual for proper viscosity and quality selection.
Was just curious if anyone had any experiences with it. I know back in the day, Kendall was very popular. Just don't know if today's small engines have different oil needs than the older types of oils can provide. Although it does look like it meets the factory Yamaha oil specifications.