R experts need help

[bama400ex]

I need some help figuring out what is wrong with my 250r. Here is the specs (the best I know): 1986 ATC250r, bored .030 over, FMF pipe, Boysen reeds i was told, with a small reed spacer (is this reed spacer factory?) 34 mm Keihin flat slide (also is a flatside carb stock?), Uni-filter with airbox lid on, and 185 psi compression. The current jetting i have now is 48 slow jet, 150 main, and a DGH needle. The jets and needle are brand new Keihin. My problem is I am way to rich. Idle to about 3/4 throttle is missing/bogging/sputtering/ just running like crap. When it finally clears up on the upper side it runs fine. But it wont rev hardly at all if you ease into the gas. I have tried different plugs and different gaps and i couldnt tell a differnce except i dont foul as many hot ones. But hopefully I wont run the hot ones anymore when i get it tuned in. I started out with the same size jets that I have now, just a different brand(not sure which brand). I have moved the needle all the way down and it runs slightly better all over except on top end, its a bit slower (probally to lean). But what gets me the most is its flooding so bad that you cannot adjust the idle or the mixture screw. From one extreme to the other it makes no differnce. Well the mixture screw will make it stumble at about 1/4 turn out, but after that its all the same. The idle adjustment can be screwed all the way up or down and it still wont idle. So help me if you can. One person told me the reeds might cause it to flood bad. But im new to 2 strokes so I dont. Is there any hope for this carb or should I just go ahead and punt it? Sorry for the long post.

[deathman53]

when mine was running very rich, with the same jetting that it was slightly rich. It turned out to be the reeds were broke. You jetting seams kinda lean also, I bet you have a problem somewhere else too, ignition comes to mind first.

[xlr810]

How is your float level set?

Are the vent tubes operating?

[bama400ex]

I moved the float it makes no difference. Are you talking about the overflow tubes? Yea they seemed to work fine, I got a piece of trash in the float needle, and they poured gas.

[xlr810]

do you have a strong spark?

[honda350r]

Try a 42 pilot ..

[bama400ex]

Im not sure how strong it is. Let me go stick my tongue on the plug and I will report back. :muscle:

[bama400ex]

I will try a 42 but i dont have one now. It kinda hard to explain but i dont think its the jetting. Ive tried alot of pilots, mains needles and needle postions, and it dont seem to make a difference where i am having problems at.

[chris46250r]

Sounds like the crank seal on the clutch side is sucking some oil.

[bama400ex]

Ok ill check on that. Would that not make it lean? Thanks for the help guys.

[chris46250r]

No. If the seal on the flywheel side is bad it will suck air and make it lean.

[bama400ex]

Ok done the pressure test. I let it set for 10 minutes, and the psi didnt go down hardly any if not none. I would say under 1 pound. I thought that might be the problem since people brought that up. Guess not.

[bama400ex]

Oh yea up there I said i didnt have a 42 pilot. Actually thats what I started with and was having the same problem. I ordered new jets and forgot to order a new 42 :rolleyes:

[86 Quad R]

i'm thinking its either the float level or the needle orfic is bad. i've run into alot of older stock carbs like that.

what did you set the float level at?