Question about 2006 KTM 125 SX

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2006 KTM 125 sx high revving out problem

Hi there,

I have a 2006 KTM 125 sx which has developed a problem, basically it wont rev out and deliver full power, when reving the bike on the stand it revs out fine, but its a different story when riding it.

So far:

Changed the plug

Striped down the carb and blown out jetts

Fresh fuel and oil (mixed @ 50:1)

New air filter

Checked reeds

Please if anyone has a clue would be great

Posted by on

  • Anonymous Mar 16, 2014

    ktm sx 125 wont wheelie no power after new piston, rings, replate, checked carb, powervalve, help!....

  • Anonymous Mar 29, 2014

    I have a 1999 ktm 50 sx pro jr. It ia getting no fuel to the plug. I have clean the carb,new piston (good compression)but will not pull fuel to the plug. HELP!



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  • 2,050 Answers

Look into your power valve. If it doesn't operate freely, you won't get peak performance. They can get gummed up.

Posted on Jul 27, 2009


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Posted on Jan 02, 2017


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