I'm stumped on the idle circuit on the PHF36 on my 2000 Husky TE-410. Stock jetting according to the manual should be a 170 main and a 60 pilot. That's exactly what I found when I opened it up. Here is my tuning procedure. Warm up bike. Turn up idle with adjustment screw. Back out mix screw unyil the engine reaches maximum RPM. Turn idle down a bit and make fine adjustments to mix screw. Adjust idle to normal idle RPM. When tuning the mixture screw, I have to open it up 5+ turns. I bought some additional pilot sizes, and even with a 66 pilot, I have to back out the mix screw to 5 turns. I checked in the carb body, no washers or o-rings stuck in there. I even bought a complete new mixture screw from Guzzino.com, thinking there may be an issue with mine. The one I received was a very different profile and wouldn't even begin to thread in. Any help or advice or help is greatly appreciated.