what sprocket set up are you using?

[jjsmx]

i am a average sized adult rider and i have a new (used) yz426 with a stock (14/49) sprocket set up. I feel like the motor is bogging down a little out of tight turns and on hills. it is time to replace them. should i gear down i little and use a 50 or 51 on the back?

[Prozach]

I always go up a tooth in the rear. It is hard to say without riding your bike, but I am sure it will help with what you discribed.