This is a spin of a thread in N.CA. I like go karts. I got into racing with a KT100. I picked up a second for when friends come along. The kart does about 60MHh. I want to get a 125cc upgrade (Parilla). The problem I have is in pushing the speed. In my 100cc KT, I think it has all the speed I need, i.e: I don't want to get in a wreck any faster! I drove Art's shifter kart and it was a flippen rush, probably faster than the 125 I want to get. I have a bit of a fear of higher speeds (70+) coupled with more racers on the track with the 125's Vs the 100's. I want to step up in the faster class, but I am not sure what my mindset needs to be to feel comfortable. What should I do?