Oh yes....the airsal 70cc kit is very fast lol. Im using a proma gp, dellorto 16, and the stock 50cc head. Very fast even with crappy head and prolly and air leak i'm suspecting hit 38 and was still sccellarating when i ran outta room (stop sign) wih only 75% throttle i'd say . That's after a 20mile semi break in, still havent gone full throttle yet, but i suspect i can go much faster than 40. I was also running a 14x45.