Jetting Sizes - Dirt Bike Forums at Dirt Rider Magazine

Jetting Sizes

  
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Jetting Sizes

 
kc04. kc04.
New User | Posts: 8 | Joined: 05/08
Posted: 01/05/09
10:21 PM

I know Carb Jetts are all classified by a number, for example Main Jet 50 or Main Jet 48. What does this number represent. Is it a form of measurement or just a model number?  

 
csully csully
Addict | Posts: 4074 | Joined: 09/08
Posted: 01/05/09
10:26 PM

measurement  
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"Only the desert has a fascination to ride alone in the sun in the forever unpossessed country away from man. That is a great temptation."
--D.H. Lawrence

 
kc04. kc04.
New User | Posts: 8 | Joined: 05/08
Posted: 01/05/09
11:24 PM

Yea, does that mean the smaller the number the smaller the inner diameter. And would that lean the bike out or rich it.  

 
bhorrigan bhorrigan
Addict | Posts: 4690 | Joined: 11/06
Posted: 01/05/09
11:34 PM

They are reffering to the diameter of the opening for the feul to pass.  A larger diameter means more fuel, or richer jetting so to speak.  
bhorrigan
Bill H.
Temperance, Mi
2000 CR250R
1991 YZ125
bhorrigan

 
yzwoods yzwoods
Addict | Posts: 16143 | Joined: 05/06
Posted: 01/06/09
05:05 AM

Bill is correct Umundo.....! Hey bill hit me on the pm with a update.  
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yzwoods
DIABETES SUX!

 
spazmoso spazmoso
Enthusiast | Posts: 386 | Joined: 07/08
Posted: 01/06/09
09:19 AM

you also have the needle,or accelerator pump,if your just fine tuning!  

 

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