KTM 350 or 450 4 enduro racing?

350 or 300 two stroke. Those are two best options, in my opinion.

I love my 350. My dads 250 2t is good too, but I feel uncomfortable on the 2t frames, the footpegs feel too high

For sure the 350 xcf-w. I won my class bac in 06/07 on a 250/315 bb xcf-w have a 200exc now but looking hard at the 350, want to get a ride on one though.

350 if you're set on 4's. 200 2 stroke is really nice too.

I love my 350xcf...probably a little easier to hang onto in the woods than the 450
I think the 350 is nearly a perfect 4 stroke woods bike.

Depends on how "enduroey" you're getting.

I'd personally go with a 350 for anything other than desert racing or Moto. They feel a lot nimbler than a 450 between the trees to me.

Also remember you will have to keep rpms higher than on a 450 where you can just grunt it everywhere.

like gringoe depends how tight and technical the terrain is and your weight. On really tight stuff, my 150 is a better bike by far.

As the terrian becomes 20 mph and about the 350 is better. Long days in the saddle favor the 350 to the 450 IMO unless you are riding 4 plusdays a month. The 200 is a great bike that many people over look. The 13 and about 200's have more mid and top than the previous models.The Husqvarna's have the 4CS forks dialed in for off road riding right out of the box.

Plenty of power with the 350
At 115 hours we put a 365 kit on it.
I'm at 200 hours now still running strong with no issues.
We run really tight single track and usually average between 13 to 17mph.
Bike turns extremely well and easy to move around.