jetting

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f7

Member

Apr 23, 2004

21

0

• Apr 23, 2004

• #1

I am new to this site just wanted to say hello.Also I have a question,I just bought a 1991 kx250 it's in great condition never raced and runs great.Only problem is that it is a hard starter,takes about 10 kicks to get it going from a cold engine.Once it is running it is fine,it has a 158 main jet in it and the air fuel screw is out 3 turns.Any advice would be great thanks.

 

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Bullwinkle58

Member

Apr 23, 2004

119

0

• Apr 23, 2004

• #2

What's up! This is my 1st post here as well.

To answer your question; check your compression. I bet your top end is worn.

 

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biglou

• Apr 23, 2004

• #3

What is your pilot jet size? Also, I'd go to 1-1/2 turns out on your airscrew. Turn the fuel on, choke on, kick it through slowly a couple times to prime the cylinder, then kick her like you mean it. See if that helps. BTW-I'm guessing you'll want about a 42 for pilot jet size. Good luck, tell us how it goes.

 

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f7

Member

Apr 23, 2004

21

0

• Apr 23, 2004

• Thread starter
• #4

Bullwinkle58 said:

What's up! This is my 1st post here as well.

To answer your question; check your compression. I bet your top end is worn.

Click to expand...

Motor was just rebuilt before I bought it compression was checked and it was at 130 pounds.

 

F

f7

Member

Apr 23, 2004

21

0

• Apr 23, 2004

• Thread starter
• #5

thanks biglou yes I do have a 42 for a pilot jet.I am replacing the carb intake boot as it was pretty dry rotted have to wait a few days for it to come in ,but I will try starting it like you said and see if it helps.Thanks again