"2005" yz250f STOCK jetting? help please!

My manual is for a 01-05 yz 250f, but I beleive the "05" has different stock jetting than the other years. Could anyone verify or please tell me what the stock jet numbers are? Thanks in advance

main:

pilot:

needle:

clip:

leak:

Hey. I just visually verified all of this on my 2005 YZ250F. Here are the stock parts and settings:

Main 182

Pilot #42

Needle OBELR (Clip is in the 4th position of 7)

Leak Jet #90

"Some other jet" #72

I found that the manual I have (5XC-28199-11) has the pilot jet mixed up with "some other jet" in the diagram. The pilot is at 6 O'Clock and the other jet (unknown name) is at about 2 O'Clock in the manual when you are looking at the carb from the bottom. The manual calls the jet at 2 O'Clock the pilot but the pilot is actually the one at 6 O'Clock. The pilot is #42 and the other one has a #72 stamped on it. I'm not sure what the other jet is for but it is apparently not very important as no one else has written anything about it anywhere I have researched.

the other one has a #72 stamped on it. I'm not sure what the other jet is for but it is apparently not very important as no one else has written anything about it anywhere I have researched.

That is the starter jet which controls the amount of fuel delivered when the cold start plunger is pulled out.

carl,

actually every year has had different jetting than the year before.

goyamaha's data matches what i have.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now