Hi, I was wondering what the target max rpm should be for my sons 79cc predator? he is on a kid kart chassis and we will be racing asphalt road course and large dirt oval. not sure on the kart weight, but it aint much, hes only 35 pounds. the motor has the governor removed, pipe, air filter and jet. I just picked up a tach but havent ran since to know where were at yet. I am just looking for a ball park to know where to set the gearing. Thanks!