Hi everyone. I'm wondering what the ideal air to fuel ratio would be for my '09 RKC. Does the gas mileage decrease as you richen the mixture from the stock setting? I can feel a definite difference in throttle response and power from a cold (enrichened) and warmed up motor. I have a stage 1 upgrade installed, SE air cleaner,Rinehart slip ons and the new super tuner. On my dyno chart the AFR averaged 13.9 or close to that. Any help would be great as this is my first REAL motorcycle :s and I'm unfamiliar with the breed. Thanks!