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The TTR250 FAQ web pages -> TTR250 -> Carb stuff -> Carburettor setup, jets & needles 1993 model
Post Info TOPIC: Carburettor setup, jets & needles 1993 model
fwtian


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Carburettor setup, jets & needles 1993 model
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Brian i read your article at ttr250.com but i couldnt understand which main jet and pilot jet is the best for a 1993 model.

 

My bike is 74mm,standard exhaust and Teikei30 carburator. You know which are the best main and pilot jets for this bike?? confuse



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TTRfan


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Sorry to confuse! I reckon it should be 137 and 50 if you are on the standard exhaust and airbox.

Brian



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fwtian


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thanks Brian! i just opened my carb and i found out that i have 142 and 48 jets! I am pretty sure the are not the OEM because they look pretty new...

My next setup will be 137 and 50!!! Thanks again!



-- Edited by fwtian on Saturday 19th of November 2011 12:38:40 PM

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TTRfan


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fwtian wrote:

thanks Brian! i just opened my carb and i found out that i have 142 and 48 jets! I am pretty sure the are not the OEM because they look pretty new...

My next setup will be 137 and 50!!! Thanks again!

 

 Oh dear - that is confusing! As I pointed out in the FAQ, some early TTRs had 142 and 48 jets. Unless you are having carburation problems or have altered something else I suggest you save your money and stick with what you got biggrin 

If there is an owner out there can tell us more about the OEM carb types and standard jetting please?

From my own point of view, if the TTR is running OK, I leave everything alone!

Brian



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fwtian


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I dont know if it was going ok with 142 48 because my top end was destoyed! :P

Anyway, after the rebuild i will leave it this way and see how it will go. But i will change it to 137 50 to see if it is better.will i see any improvement?

I have a shop near me that sells jet really cheap!

What jets you used when you had your bike 250cc?



-- Edited by fwtian on Saturday 19th of November 2011 01:24:42 PM

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TTRfan


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147 and 50



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fwtian


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i got confused again confuseconfuse

147 or 137?

The newer models has  137 50 stock.

My 1993 model has 142 48.

 

 



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147



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