2003 CR250 stock TMX float height

I am going to stick with the stock Mikuni w/powernow insert. I made the Kiehin swap on another brand, and was happy - but I'm not doing it on this bike.

Have you guys found that a certain float height works best on this year TMX, or should I stick with what the manual says?

First of all, what TYPE of TMX do you have?

Is it the TMX w/ the flat slide, or the oval slide?

If it's the flat slide, is it the flat slide w/ a semi-circular back, or the flat slide that looks like a match box ?

First of all, what TYPE of TMX do you have?

Is it the TMX w/ the flat slide, or the oval slide?

If it's the flat slide, is it the flat slide w/ a semi-circular back, or the flat slide that looks like a match box ?

I'm guessing that I have the oval slide TMX, as the top of the carb appears to be oval?

I took the slide out - It is a flatslide like a matchbox. It is rectangle and has a small area cut away on the bottom of one side. The slide has a 4.0 stamped on top.

Correct. Typically, any TMX w/out a TPS is going to be the slide that's rectangular shaped, like a matchbox. The TMX ones before the 2002-2004 cr2, I believe, has the flat plate on the back side, and on the front side, has a semicircular extrusion, w/ just enough radius on the body to surround the spring's diameter, IIRC. For all practical purposes, the 1st gen TMX is not the same as the 2nd gen TMX which is not the same as the 3rd gen TMX. Jetting for each is unique, as well as how the float dimension is measured.

As far as what to do w/ the float, I would follow the manual's 2002-2003 instructions. The only time I see anyone deviating from the recommended float height is with the freestyle guys. They typically change the float level to increase fuel pressure for when they're doing their stunts upside down.

Correct. Typically, any TMX w/out a TPS is going to be the slide that's rectangular shaped, like a matchbox. The TMX ones before the 2002-2004 cr2, I believe, has the flat plate on the back side, and on the front side, has a semicircular extrusion, w/ just enough radius on the body to surround the spring's diameter, IIRC. For all practical purposes, the 1st gen TMX is not the same as the 2nd gen TMX which is not the same as the 3rd gen TMX. Jetting for each is unique, as well as how the float dimension is measured.

As far as what to do w/ the float, I would follow the manual's 2002-2003 instructions. The only time I see anyone deviating from the recommended float height is with the freestyle guys. They typically change the float level to increase fuel pressure for when they're doing their stunts upside down.

Done - thanks!

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