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mystery problem 2006 cr250

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I bought a 2006 cr250 and the guy said it had just been re jetted and it was hardly starting and it was really fat.. i checked the jets and they are fine i put a new top end in it that didnt help any i tried adjusting the electronic RC valve and that helped a little but not much i checked the reeds and they seemed fine but i think im gonna replace em any way.... what could it be???? :banana::lol:

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its hard to start or not starting at all? Fuel getting to the carb, good spark?

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Fouled plug probably. Check the plug, and install a new one just because.

Report back the jetting as well, if it's been rejetted on stock carb he probably went to a 410/32.5 needle on the 2nd clip 1 1/2 turns out. But check and let us know.

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the jets are 410 main 37.5 slow jet 3rd clip on the needle and 1.5 turns out... it runs but it has absolutely no top end it just drowns out and it gets really fat... those are the jets fmf called for and thats the jets that are in it now... im gonna try and go back to stock jetting and see what happens

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Possibly has fuel in the bottom end? If bike was sitting for a long time, its possible. Try changing the tranny oil, see if there is any gas in the oil.

-Try removing RC Valve cover, and running the bike to verify the power valve is opening all the way.

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