It acctually not for a kart but to put on a micro sprint. The pulse pump will not push it up from the tail tank to the shut off valve witch is higher then the carb. I don'want to run a electric pump because I don't want to run a battery and regulater. Could run a pump off the motor if I could find one small enough, it only has to make 7 or 8 psi(only has to feed a Mikuni 41 mm carb).