i am trying to help a good friemd of mine he has a 1999 kx125 and we can't seem to get the jetting just right it seems like its just out of balance some how. the bike is stock we are at sea level the jetting is stock but i have tryed going up and down on the main and also up and down on the needle but it seems to run best at the stock settings. i feel like there is something wrong with the power jet like its not working is there a way to check if its working properly or working at all? i rode the bike for about 15min and then disconected the power jet and rode ot for anouther 15min and the bike ran exactly the same with or without the power jet pluged in. i know he needs to buy a service manuel but he broke and im trying to help him out. if anyone knows how to check if the power jet is working right or at all (or if you have a manuel for a 99 kx125 you could check and see if there is a way to check the power jet system)please let me know any help would be greatly appreciated thanks