Need help on jetting size?

[lilgreenmachine]

I am ready for installing my fatty pipe on my 2007 kx100, when i ran into a problem... i dont know what size jetting i need to use... i called several places and all they say is that its a trial and error... i need some opinions on what i should get... let me know.. i really appricaiate it....

 

[IndyMX]

They weren't lying.. There are no set jet requirements..

Jetting is based on several conditions. The Temperature, Humidity, Elevation, Fuel Quality, etc...

the best bet is to find out whats in the bike now. Put the new pipe on, do a few tests with the new pipe, and determine if you are rich or lean, and adjust accordingly.

There is no magic fix that will keep you from having to learn how to do it properly.