KDXRIDER.NET

I have a 2003 with a woods pipe, stock silencer, vforce 3, and snorkel removed. I have jetted to where I thought it ran perfect until I went on a ride with a couple friends. After hours of just off of idle and very slow speeds my bike loaded up and began to fowl the plug. I got out on the road and it cleared out. I decided it is a little rich so I turned the air screw out another 1/4 turn (now at 2 turns out) I keep reading that a 38 is probably as small as I should go but it now seems that a 35 pilot is in order. The 148 main jet checks perfect if not a tad rich on the plug. starting at 4500 feet mnimum. usualy take off at 5500 and up. what do you all think?

That's HIGH altitude. Give your bike what it wants....You're on the right track. Did it run better after the 1/4 turn? Go ahead and change it. You not going to hurt anything w/ the pilot....You'll know if it's too lean.

Mostly same bike as yours except I have the carb and head mods.

I use 150/38 (normal hot Phoenix summer) or 148/35 (June & July hot Phoenix) at 1200 MSL.

For 7,000 in Flagstaff I've gone down to 145/35. Never done a plug chop up there, but it runs as well as I would expect it to that high.

I thought that is what I would hear. So Ill get another jet for my collection. thanks guys.