Hey guys, I put on a Delkevic exhaust and PCV and had it tuned. Now that it's all dialed in I went from low 40's MPG to 30. They said it's because my bike was so lean they had to add fuel to make the AFR optimal. Is this basically because of the exhaust? Is there some way to get my fuel mileage back? Honestly thinking about going back to stock just to get my mileage back.