Maintenance & Technical > KX500 Original

91 pwk39 question.

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shoe757:
Just recently bought an 03 Kx250 with a 91 500 motor transplant. It was running what seemed pretty rich and kind of choking on acceleration. Tore the carb off today to clean it and maybe move the needle clip up a position. Well the 6mm nut on top is stripped and I have no idea how else to remove it. I'm trying not to dish out $200+ for a used one. Has anyone had this problem, has anyone successfully replaced the pwk39 with a better carb that's more readily available for parts?

thanks,
Will

Foxx4Beaver:
here's a couple old threads on the subject...

http://www.kxriders.com/forums/index.php/topic,13223.0.html
http://www.kxriders.com/forums/index.php/topic,7313.0.html

Foxx4Beaver:
when you put it back together, don't go crazy tightening that bolt back in....just snug it, or you will be having the same problem again.

alexander-vmann:
after i checked the needle positinoing i tried getting the cable back in the slot that holds it, but i could not hold the spring back enough to do so and ended up cramping my index finger, so i got quit angry and attached the cable without the spring and then kinda hooked the spring on the cable and twisted it on, so what is the correct way to install the cable back onto the slide?

shoe757:
Wouldn't see why that would be a problem. And I appreciate the help guys but I already tried tapping a socket on. May have tweaked the needle some in the process so it looks like I won't be racing this weekend. Thanks for the fast responses guys!

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