KDXRIDER.NET

Hey there, I need some help with my jetting(possibly). Let me explain the problem first, when I try to open the throttle from idle to full or just half too fast the bike bogs badly, when I don't close the throttle fast enough it dies, but it takes effort to not close it fast enough (like 5 seconds of the thing dying) I use castrol power 1 2T at a ratio of 40:1. Air mixture screw at ~1/5 from completely closed(guessing bigger pilot jet) And the altitude is ~4000ft normal temp is about 30C or ~90F. Some help would be great!

If everything is mechanically sound, try the next size larger pilot jet.

and welcome to kdxrider.net!

Thanks! Really happy about my KDX, it's my first bike.

Congratulations on the bike, as well as it being a KDX.

I'd go 1 size bigger on pilot jet also to see what happens. What size is in the now? Keep a clean air filter.

You want your Air Screw to be in the 1 to 2 turns out range ideally. Have a look at the jetting guide (link in my signature)

When you put the next larger size pilot jet in, turn the air screw to the stock position, I think it is 1.5 turns out, then adjust from there.

Oryxr5, Your original post says: (Air mixture screw at ~1/5 from completely closed(guessing bigger pilot jet)

Does that mean 1.5 turns out?

I haven't checked the current jetting, will do that this weekend. And the 1/5 turns from fully screwed in is from about 2 'O clock (fully in) to about 12(the current setting) And it seems like the pilot needs to be about 1 or 2 sizes up