Yfz boggin out while in throttle, help

[SE_YFZ_08]

Just got a 08 yfz a week ago has under 12 hours on it and got it serviced last week and went to ride yesterday and after I was on it for about 15 min I was in 3rd about half throttle and I went WOT and it bogged out. But it would start right back up no problem but as soon as I went to letf the Clutch out it would die.
I changed the spark plug and checked the carb and it was clean no dirt in it or anything.

[89trx250r]

hey dude i had the same problem today turned out my fuel on off switch got clogged or something had to jiggle it with the hose dc'd from the carb till fuel ran freely could be the same issue could not be just tryin to throw my .02 out

[XCRacer236]

could be the infamous bog or its vaporlocking. is your hose on your gas tank lid vented?

[squarepants]

Had the exact same problem with mine.It turned out to be the switch in the thumb throttle being faulty.Unplug it and put in a loop to join the 2 wires!!.it broke my heart for about a month trying to find the problem

[TRX_450]

make sure your choke isnt on, i know it sounds stupid but ive done it numerous times on my 400 and it took me a bit to figure it out. its worth checking anyway

[450Rida]

what color is your sparkplug? could be too rich. if its realy black try a smaller main jet