It's happened several times and all have been in the least convenient situations.

I'm chugging up a fairly steep incline, forward motion stops to avoid a tree, big rock or other obstacle, I grab the brake and clutch to hold the bike until I can calculate another path, etc. While sitting here, within a few seconds the dang bike sputters and dies. Hit the starter and eventually starts. I know it's not the end of the world but it can be very unhandy at times.

Guessing my problem, beyond lack of riding skill, may be related to the fuel level in the bowl. Checked the fuel level this evening and found by clear-tube-to-drain-method that with the bike on a level surface the fuel level is exactly at the height of the bowl-body interface.

The carb's a Bill Blue Mikuni TM33, so the KLX service manual doesn't cover it's repair or settings. I have't taken it off yet so haven't measured the float level, which I think should be 14mm, but does anyone know the proper height of the fuel level?

Or, does anyone know if my problem may be related to something other than the float setting?

 

Other than that it's ok? Doesn't stop when you are on level ground?

https://www.jetsrus.com/carburetor/c...iew_parts.html

 

As a matter of fact, it runs very well in most every other respect.

Standing over the bike at a stop I can get it to die while idling by jostling the bike up and down or forward and rearward. It does not die otherwise.

Thanks for the data sheet.

 

Sounds like a fuel starvation problem. I'm sure someone will be able to help more

 

When it stalls and is hard to refire-does it act like it's flooded? Need to do a bit of testing to see if it flooding when on an incline-which would suggest that the level is to high. When it acts up-hold it WFO and see if it starts any quicker.
The spec listed is for measuring the actual float position-not the fuel level so don't get confused.

 

Changed out the needle valve last night. Found a couple of things that might have been at fault. The first thing I noticed was small insect parts in the bowl. Not many, just a few. I also noticed that rubber portion of the needle was slightly worn. And finally, the float was about 2mm too high, as measured. I lowered the float to spec, which, I believe will raise the fuel level in the bowl.

Didn't have time last night to take it for a spin, but did find that one issue was resolved. The motor no longer dies at idle when I jostle the bike.

Hopefully, it's fixed.

 

Good luck

 

Are you measuring it with the carb upside down, the proper way? If so, yes this will raise the level.

 

Yes, more or less upside down.

Actually, I held the carb almost sideways to keep the full weight of the float from compressing the spring on the needle. The float height was measured at the point where the needle is seated but the spring is not compressed.