Correct jet sizes for a rich-running 2007 TE450

Esteemed fellow riders -

Parts fiche calls for a #180 main jet and #50 idle jet. My 2007 Husky TE450 has these, however it is experiencing the issues below. Am I misreading the fiche? Could it be an electrical problem? What's your opinion?

Symptoms:

• Starts easy and runs well cold
• Runs rich, smells rich, atrocious gas mileage
• When hot, chopping the throttle stalls the engine
• Also stalls easily in low RPM conditions (tight trails, etc.)
• Idle does not change when adjusting mixture screw

Troubleshooting:

• Disassembled FCR carburetor. Very clean inside Cleaned all parts again.
• Checked for aftermarket jets. They are factory afaik (#180, #50).
• Carb diaphragm base plate was warped due to over-tightening. Replaced both diaphragm and base plate, squirts like a snake now.
• Carb floats were set high. Adjusted to lower setting.
• Needle clip set to 5. Changed to 4.
• JB welded a superficial crack in the main jet housing

She's a pain-in-the-ass Craigslist bike but when it runs properly, it's the bomb. Appreciate your advice here.

You gave out a couple good bullet points above but I am not the Ace here on CARB stuff... I'd look at the plug color at the low, middle, and Wide-Open throttle settings and jet there accordingly ...I have no clue on what jetting sizes you might need to go downward towards to get rid of a rich setting ..

Did changing the needle clip settings change anything?

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I can't believe the WWE(?) is trying to remove The Hulkster from their history ... BS to the MAX.

If the idle jet or main jet have ever been cleaned with steel wire or drill bits, they could be enlarged enough to make the bike run way rich. I had a carbed bike with this problem some years ago. The jet sizes stamped on the jets were correct but when I got new jets of the same size, they were much smaller holes than the wallowed out jets.

I'm running a 45 PJ in my 09 TXC 450 and think it's still a bit rich. 50 sounds too big.