Originally Posted by Pantah
My son had a KTM 350 EXC-F. It is street legal. He won a race in Baja with it. He now has a 450XC-W which is a real race bike. It is hard to ride because it has almost no flywheel and the motor hits very hard.
Hands down the 350 is a sweeter bike to do most things with. Very easy to ride well, according to him. Plus it's pretty fast.
I have several friends with the KTM 350's and they love them. I will stick with my Crf450x though, it fits me and works great.