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XR250 Carb question (1990)

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I recently purchased my first dirt bike and decided this older 1990 XR250R with a fresh top end rebuild would be the perfect starter bike.....or so I thought.

As it stands now, the bike won't run without choke. 1/2 choke is usually about perfect. If I go much less than that, it acts starved for fuel.

It also lacks top end power. Low end is fine however the engine starts to sputter as the RPM's climb.

Yesterday, I removed & cleaned the carb carefully with carb cleaner & an air compressor and reinstalled with high hopes....but the symptoms remain same. :p

Any suggestions? There is a brass screw on the bottom of the carb that I can't turn by hand & don't have a 90 degree angle screw driver. I'm guessing that is mixture however they don't make it very convenient to adjust.

I also noticed an exhaust leak up around the left header. Would that significantly effect performance?

Any help would be greatly appreciated!

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your not making the old YSAM error are you? you know the choke is up for on? lol

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your not making the old YSAM error are you? you know the choke is up for on? lol

I don't know what YSAM stands for but it describes me to the 'T'!! :p

Consider this topic closed. I'll go back in my hole now.

And in all seriousness, I really appreciate it taggkent. Your 3 second answer saved me a LOT of trouble.

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:ride: no problem at all.

YSAM is another xr owner who had the same problem as you, much to everyones amusement lol.

Enjoy :p

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