06 yz 250 throttle sticking!!!

Wanting to know from all you YZ owners out there if any of you have had a problem with your throttle sticking @ 1/2 throttle.
At 9 hrs on bike (mostly MX) coming out of a corner throttle hangs half open on straight away (thank god). I pull clutch in and hit kill button. Start snapping throttle back and forth and all seems fine. Check cable route and nothing is visually wrong or obstructing. I go to start bike and it fires @ half throttle screaming!! Take bike back to truck and start tinkering. Pull off throttle, inspect,lube,ect. Cable seems fine. Fire bike up and all is fine until I hit whoop section, throttle hangs half open. Take bike back to truck and start messing with cable. I notice up @ the cable adjustment on throttle there is excess play. It looks like the slack in cable is pinching between the wheel that cable routs through and the housing. I adjust slack out and head back out and all seemed fine until now!!

Now at 15hrs on bike I come out of corner and blurp throttle to clear small double. Throttle hangs @ half throttle and launches me!!! I land on face of another jump some 60ft away with legs flying everywhere and yz screaming like a banshee. Thank god I am not hurt, just scared ****-less!!!! I roll bike back to truck and immediately look at slack in housing. Make another small adjustment and head back out. Hit whoop section three turns in and it hangs again. Take back and start fiddling. I find nothing wrong, cable is perfect in all areas, throttle tube and housing is new, nothing wrong. The bike was fine for six hours of riding time in between hang ups. No crashes, never been in carb for nothing, all is stock and new. I call dealer and talk to the shop manager and tell him whats going on. He wants to look at it and asks for me to bring it in. They go through the bike and find nothing!!! Said that cable adjustment on throttle cable was to tight (I admited to doing that) and that idle screw was turned to far in. Said that my bike really doesn't need to idle and they backed it out. Said that idle screw doesn't actually touch slide no more. Said it touches some actuator arm or something and that in turn touches slide for idling adjustment. Never had one of these carbs apart so I really do not know. Said it looked like this "actuator arm" could of been hanging up slide, but wasn't sure. Charged me $70.00 for all this. I said I had no problem paying it, but if this did not fix it this problem that they would be fully responsible from here on out, they agreed.

Now, I am getting ready to ride bike again. My confidence is really low in this thing. I am first going to go through whoop section about 50 times to see if problem still exists. There is a straight away right after that I am confident about getting bike shut down in.
Just looking for a little help in getting "my balls" back under me and if anyone has any advise in what the problem may be.
Not very confident in what dealer told me!!!!!!

They said they pulled apart and inspected everything. They said that they did look for "burrs" of some sort of "factory defect". So they say!!!!

And found nothing, nothing wrong at all.

Has anyone heard "your bike really doesn't need to idle" theory. I did turn idle screw in 1/4 to 1/2 turn to make bike idle. Just like for my bike to idle, did not think anything wrong in that. I had an 02 YZ, and a 05 YZ that I turned idle up on and had no issues. Just curious!!!!!! I adjusted when bike was new. Put 9 hrs on it before it started acting up.

The track, that I will be at, whoop section isn't that long (15-20 whoops). I feel that it will need to be jarred around some in some rough stuff to see if I can get it to act up. Just not feeling ballsy enough to jump quite yet. Thanks all for your reply's, keep'm com'n.

O.K. all. Just returned from ride today. All is not well. Went through whoops about 10 times and then on about #11 she hung up again. Pulled clutch in and hit kill button. Pushed back to truck and called the dealer. They said to leave it hung up and bring back to them and they will tear down again. Funny thing now is it's not 1/2 throttle, it's about 1/4 throttle now. Anyway, it's still hanging up.

Just recieved some info from a friend that is babysitting my bike at the shop. The shop hasn't called yet but this from him as he helped dismantle bike. The needle is catching on the way back down into the main jet/spray bar area in the bowl. Said that the hole for the needle in the slide is off center and not lining up. Said it is some sort of manufacturing error. They put a call into Yamaha to see what the next step is. Hope this is it. I feel my confidence rising.

Got confirmation from shop that slide is defective. Yamaha corp. is sending new parts (slide,needle, and clip) to shop at no charge to me. They call it "Goodwill" or something like that since this is something that can cause injury. Everything is good and I am glad they are taking care of this. Shop will inspect new slide and compare it to old before installing. If everything checks out they will install and keep bike a couple more days riding to see if problem is fixed. I sure hope this is it. To all you other 06 yz 250 owners, I hope this is only a rare occurance, but be careful!!!!!