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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Trying to adjust my Carburator
Post Info TOPIC: Trying to adjust my Carburator
Serial


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Trying to adjust my Carburator
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Plz anyone got any idea where fuel mixture srcew is on the carb?

When i open full throttle i m facing some engine jumble...

 

i have aftermarket exhaust...and never befrore tried to adjust the carb...i think thats the problem...the fuel mixture is very rich-poor or something similar...

ps:i already put new air filter and new spark...but the prob remains.

its not a big issue but i think I lose some of horsepower.

 

im reading the manual but it keeps sending me to Mr. Yamaha for carb adjusting

 

 

 


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TTRfan


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Hi there

If your TTR has problems at over quarter throttle then the problem lies with the main jet.

To adjust the fuel/air mixture on the main jet requires moving the needle up or down a clip or two depending on whether you need a richer or leaner mixture.

A rough and ready check is to try the TTR for a short run (after the engine has warmed up) without the air filter cover. If it runs worse (as I expect) then you probably need to richen the mixture by raising the needle a clip or two.

Lots of useful "how to" threads in the carb section.

Brian



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Serial


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Many thanks Brian you really help me there...

ill try it, and in parallel ill search the carb thread for infos.

(i know, mechanical is not my forte)



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TTRfan


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This thread is good to start with.



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