1986 atc250r flooding (help needed)

[archer45]

Just finished a 3 year restoration project on a 86 250r. Started it up Monday adjusted air screw and idle speed and will idle fine. rev it up a couple of times it kills and floods out. Pulled the plug (BR8) and was wet fouled dry It off it will start right back up and idle but you rev it up a bit it stumbles and kills cant make it out of first gear. Its acts like its getting to much fuel or loosing spark. every time it does this you can dry the plug off and will start back up. Carb is a Keihn PJ 34mm and very clean with a 145 main 42 pilot 1468 needle. stock exhaust What I am is missing? any suggestions

[Red Rider]

Did it run fine before the restoration? Is this the same carburetor? Is your carb float sticking?

[BOB MARLIN]

Float may be sticking, or set too high. choke stuck on maybe ?

[yaegerb]

Carburetors are a step by step process. I always get the pilot correct then work the main, then fine tune with the needle.

Start it up, get it idling and bust out the screwdriver. Rule of thumb is air screw <1 turns, pilot is too small, >2.5 turns pilot is too big. Seat the air screw. How many turns out is the throttle very crisp (revs out quick and come down to idle fast)? Report back with your findings so we can at least help you determine if the pilot is correct.

[MPDano]

The float is stuck. Whenever I rebuild my carb. I always verify this piece. To test (carb should be clean), connect a short clean host to the fuel inlet, with carb in upright position with bottom cover off, blow air with your mouth in the tube, it should flow free, continue blowing and move the float upward and it should stop letting you blow air. My float adjustment baseline and I usually never need to adjust it afterwards, flip the carb over and the float in it's closed position should be level with the carb (where the upper and lower carb pieces are joined).

Hope this helps.