Race Fuel

Im Fitting A 13.5:1 Je Piston To My 99 Yz400f. Will I Need Race Fuel Or Will 97 Octaine Be Enough.

Im Fitting A 13.5:1 Je Piston To My 99 Yz400f. Will I Need Race Fuel Or Will 97 Octaine Be Enough.

I personally use race fuel for many reasons, but most 13.5:1 YZF's will run just fine on pump gas, but if you hear it pinging, you need to start mixing some pump and race fuel.

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