Honda lists it as 20:1. With today's improved 2 stroke oils, you can run less. Less oil does not make more power, in fact, it is the opposite. I run 32:1 as a balance between smoke and engine protection. You may need to drop your slow jet down to a 45 from a 52 to prevent loading up at idle. Less oil means a thinner mixture that flows easier through the jets on top of that slightly more of the mixture is fuel.