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06 Exc 450 carb issue

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My 450 has a off idle problem. When bike is hot and I shut off the bike and sit for 10 mins or so it will fire up ok but as I ride it and feather the throttle off idle to 1/8th throttle the power comes on hard and when I let off it shuts down hard. If I run it out of fuel while riding it and turn on the petcock back on it will transition smooth from idle to 1/8th throttle. I put the jd kit for the heck of it. No change. Checked float. Not flooding. Valves in adjustment. Tried different fuel adjustments same issue

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Thanks for the reply. Carb is clean. I ran a richer jet well before the problem started. I only have an issue when I shut bike off after it's hot. All vent hoses are clear also. It's been an issue for a couple years now. Run it out of gas. Turn gas on and it's fine. Weird

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I'd suggest a full carb tear down and soak the carb body in a tank. Sounds like you've got some crud up in the carb body passages. What is the condition of all o-rings and carb slide, accelerator pump diaphragm?

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Acc pump was changed last year when I put the j d kit in. I could check the slide out again. What other o rings can I check beside the acc pump assembly. When I first started to have the problem I had a bigger aftermarket tank on and thought it wasn't venting and was forcing fuel past the float needle That wasn't it. I'll see if I can get the body tanked and just go through everything again. The bike has been a rock. Just went over 2000 hrs on the engine,same clutch just had to put water pump seal kit this winter.

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