Yamaha doesn't specify the octane rating when they make their recommendation to owners? I figured each country's manual would be adjusted for the local measurement method.
The manual I found online says:
Recommended fuel: Premium unleaded gasoline only
Your Yamaha engine has been designed to use premium unleaded gasoline with a research octane number of 95 or higher. If knocking (or pinging) occurs, use a gasoline of a different brand.
The manual I found online says:
Recommended fuel: Premium unleaded gasoline only
Your Yamaha engine has been designed to use premium unleaded gasoline with a research octane number of 95 or higher. If knocking (or pinging) occurs, use a gasoline of a different brand.