Maintenance & Technical > KX250 / KX125

91` 125 wont rev

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Hillclimb#42:
 It sounds like a carb problem still. Try not to eliminate possibilities too quickly. 1st you said jetting was fine, but the main fell out and the pilot was clogged. :? Is the fuel fresh?
 What's up with the powervalve? it doesn't open and close on its own? Full of goop? All that it would take is some  debris holding the float open or clogging the jets. Having a main thats too rich would also be something to chase around. Air filter is clean? its something simple, probably in the carb. Choke is operating correctly right?

Jopiz:
Jetting is fine 158 main, 55 pilot, float level correct 16mm. Air filter cleaned and oiled (not overoiled). Fuel is about 8 hours old. Choke operates correctly. Kips works. I just tried to lock it to fully open to be sure its not the issue. There is a problem in the Kips operating thing. It doesnt close or open on its own. It moves a littlebit though. It may just be that i havent got enough RPM to get it moving.

 I just cannot understand how the mainjet fell out and pilot was clogged. I ran it only for about 20 minutes.

-Jopizz

Hillclimb#42:
stock pilot is a 48. any debris in float needle would keep the flow going. the powervalve not working with rpm's is probably the biggest thing to take care of. mine open quickly and look like they will shoot out of there. You are getting wet /black plug readings?

Jopiz:
The stock pilot is 55. I checked it. 48 is Stock for 92?. I'll go and check the plug. I'll post a picture later. In what RPM does your powervalve open? Fully open at 6000?

Jopiz:
Yeah! The RHS crank seal was gone! It sucked 8 dl of transmission fluid through it in just 20 minutes. Problem solved all by my own  8-)

Thanks for help.

-Jopizz

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