Picked up a 2003 KLX400 for 1000.00. From what I understand, its the Suzuki DRZ 400E in greeen clothing. It has the Yoshimura add on and thats about all. Some change of plastics, but stock otherwise. What is the best carb jet kit to get? The JD kit or DJ kit? I have a print out of the DJ kit and have owned bikes for over 30 years so not afraid of doing the mod myself, just want to put whats the best for this application in. Elevation around 5600ft above sea level. I hear people talking about the 3x3 air box mod and a "free power mod". Having a little hard time finding out what the details are on that. Not looking for some outrageous horsepower, I have my 1125R for that, just want to make a nice bike more user friendly so to speak. Plan on doing the loc tite to misc nuts, bolts etc as I have come across on TT, so that will be covered. Input would be appreciated. Thanks fellas.