Hey guys, just sold my 400ex and my yz250 and bought a 2008 KX250f, I'm having a few problems with it though, for some reason if you rock the throttle back far enough the carburetor will stick in the full throttle position... And also the twist throttle will not spring back at all anymore. Thanks in advance for the help!
250F Carburetor trouble
- Thread starter Xecuter242
- Start date
James
Staff member
I've had the same problem with my 08 kx250f, if I remember though it was primarily a cable routing issue. As long as your cable insides are clean and oiled, I'd start messing with the routing and cable length adjuster. I'd also take the throttle tube assembly apart and clean it.
Also if it does stick, while riding, remember that it has a return cable (2 cables), so simply rotate the throttle back towards idle.
Thanks for the reply! When I rock the throttle all the way back it will "lock" in the full throttle position, there's some sort of locking arm on the side of the carb where the cables connect, and I have to go in there and release it... I've never messed with a carburetor like this.
James
Staff member
Hmmm never heard of that before, could you post a picture of this "locking arm"?
All the way bottom right of the picture,the spring and the black plastic piece, when I twist the throttle all the way back, or if I do it by Turning the wheel or the carb it still does it, I have to move the plastic piece and it will release it. I took it to the dealer and asked a mechanic what was wrong, but just wasted my time and gas...
I'll be taking it back down tomorrow, and I'll take some detailed pictures.Never heard of such a thing!!If you want to dismantle it, remove the circlip from the top of that mechanism. Sounds super dangerous as-is. Let us know what you find!-BIG DAN
Ok, I fixed the problem where the throttle wouldn't spring back, the cables were too tight.
But the carb slide still locks at full throttle.
Here's a picture of it locked, the locking arm is at the tip of the screwdriver.
And here's a picture of it unlocked
But the carb slide still locks at full throttle.
Here's a picture of it locked, the locking arm is at the tip of the screwdriver.
And here's a picture of it unlocked
I think that's all it's for, Is locking the slide open. I'll remove it today and let y'all know what happens!
Thanks for the tip! I took that piece out of there and she's running like a new machine!Take that device apart. It doesn't look like it serves any other purpose. Could be very dangerous. -BIG DAN
James
Staff member
It's there for a reason, I just don't know what that is. 
Could it be that the spring holding that little lever is worn out? You can see it on the parts diagram.
http://www.motosport.com/dirtbike/oem-parts/KAWASAKI/2008/KX250F/CARBURETOR
Could it be that the spring holding that little lever is worn out? You can see it on the parts diagram.
http://www.motosport.com/dirtbike/oem-parts/KAWASAKI/2008/KX250F/CARBURETOR
That's true, but at least I don't have to worry about extreme whiskey throttle, I'll ride it for now, one day I may figure out what it's for.It's there for a reason, I just don't know what that is.
Could it be that the spring holding that little lever is worn out? You can see it on the parts diagram.
http://www.motosport.com/dirtbike/oem-parts/KAWASAKI/2008/KX250F/CARBURETOR
View attachment 16792
James
Staff member
That's true, but at least I don't have to worry about extreme whiskey throttle, I'll ride it for now, one day I may figure out what it's for.
BTW what did you pick the 08 up for?