Pilot jet too large?

Got questions? We got answers....
Post Reply
Matt-itude
Member
Posts: 46
Joined: 12:02 am Jun 25 2005
Country:

Pilot jet too large?

Post by Matt-itude »

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?
User avatar
fuzzy
KDXRider.net
KDXRider.net
Posts: 3437
Joined: 01:29 pm Jun 18 2003
Country:
Location: Fredneck, MD

Post by fuzzy »

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.
'91 KDX 200 Project $300 KDX
'95 KDX 200 Project $600 KDX
'94 WR 250 Always a project
AZRickD
Member
Posts: 524
Joined: 08:51 am Jun 29 2006
Country:

Post by AZRickD »

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 done KX-ed QuailChaser's KDX220R
Matt-itude
Member
Posts: 46
Joined: 12:02 am Jun 25 2005
Country:

Post by Matt-itude »

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