Yamaha R3 Dyno Pull With Mail In Tune w/ Under-tail Exhaust

At this point all I had done to the performance of the bike was the exhaust and take off all emissions equipment. With a so called mail in tune where they just remap the ECU without having the bike on a dyno, I was getting 37 dirty horsepower. My exhaust valves were getting burnt because the fuel ratio was off. Once he did a proper dyno tune and with velocity stacks added, he got 41 smooth horsepower and a much better power band. Check out Black Widow Power Sports in San Antonio for quality dyno Tunes!