KDXRIDER.NET

Alright, my dad wants me to buy some parts for the atv tonight so im gonna get everything i need for the kdx besides fork stuff. While im doing this i might as well buy some jets.

I have an fmf pipe, VFII reedcage, a good amount of small holes in the airbox, and a 200 carb on my bike. The jetting is stock and I running 32:1.

I want to switch to 40:1, what jets do you all reccomend i purchase, becasue i have no clue were to start. Thanks

The stock jets for that carb are 160 main and 48 pilot, they are most likely too rich.
For the 35mm carb I would get a 52,55 main and 42,45 pilot. That would be a good start anyway. You may also want another needle, I used the CEL with good results but I would get the main and pilot squared away first.

Main jets: 150, 152, 155.
Needles, stock #5 slide: DEM, DEL, CEM, CEL
Pilots: 40, 42, 45
slide: #7 (if you go with this slide you'll need to change your needles to DEK, CEK)

My set up on the stock 35mm carb was: 152, DEK/3, #7, 42, air screw 1 1/4 @ 2600' and 80 degrees in a dry climate and 40:1 synthetic premix.

i just opened up my carb, and i have a 155 main and a 48 pilot. What should i do from there. I am also going to have to break in my top end. should i leave the jetting the way it is untill the motor is broken in or does it not matter?

Leave it!

just for the break in?? my bike was running very rich. Which im guessing is good for a break in

Yup!

After you get her broke in.... we can start optimizing you jetting.

alrighty