Trying to find out if the jets on my 2002 BF50A are high altitude, or if they are stock. Bought used from someone who used the motor in high altitude, but not sure if the high altitude was all the time. Can't find the Guy's phone # to ask him. I have the top carb off; to clean,the number on the center jet is marked 42G the jet on the side has no numbers. Was wondering if anyone could tell me if the jet marked 42G is stock or a leaner jet.