This package uses a 25mm restricted header and a Nox airbox, making about 29 horsepower. With the driver the kart is 355 pounds in this video. A set of Levantos is good for 150-160 laps, and a lighter kid might reach about 200. It runs 2-3 seconds slower than Senior Rok Shifter. Reeds last a very long time. Pistons look solid so far and life may be similar to a KA100. The crank may last two to three times as many hours as senior rok, maybe more, because these only rev to 12.5k. A chain has never been replaced on one of these. It seems like a solid class package.