Hughes is right, it will run fine. I once got a wild hair. I though that by disconecting the the power valve I could ride a two hour harescramble faster sence it wouldn't hit so hard. It ran fine for the race but it wasn't fast.
It sounds to me like your having jeting problems. If its bogging down after long periods of slow running, you are probilly a little fat on the pilot jet which is dumping to much fuel in when you first crack the trottle, but not reving high enough to clean it out. It may want to foul a plug, on the next cold start. I had to put a new plug in before every ride, Especially if it was a tight race.