Perhaps you guys want to have a second look at it. I feel like the shifting has a little bit too much lag, more than I ever remember in the thousands of laps I ran in a shifter. Also, perhaps look at the engine performance, the shift light on the Digitron comes on pretty early. from what I remember, shifter karts made their pwer when you were maxing the revs, not short shifting. When I tried to tach it out, and made a set to account for this, i was a couple seconds slower. just something to think about!