KDX and KTM are too different animals!!
I bought the KTM in March, The boys got into riding and I thought it would be a great woods bike. It is, the suspension was a dream, it wasn't that hard to set up, is great as soaking up anything NEPA. can dish out. I threw a dyno port pipe/silencer on it, a boysen rad valve and a O ring chain. It's great, fickable, power to the moon, man when it comes on the pipe, there's where the problem lies. early in the hare scramble it works great. later when your tired and want to lug, it comes on the pipe and wham into a tree. I added a little more flywheel weight, helped some but still....
The KDX has a dyno Port pipe/ silencer rather than FMF cuz thier kinda local, Boysen power reeds, 12 tooth front sproket, Freddette pipe spacer, a power pro piston and heavier springs. The bike is a good bike. It doesn't do anything wrong nor does it do anything great. I wanted power like the one I had in '89, (low end grunt) It descent off the bottom, has good mid and top. It kinda hard switching between the 2, I use the KTM for the few MX or fast hare scrambles I do.
Bottom line, KTM is expensive, but all great parts in it, maintenance parts are twice as high. If you race, are an agressive rider this baby for you.
KDX is a old friend, feels heavier than the KTM lifting and riding,mine runs fast, great, handles no too shabby is cheaper to maintain, gets better fuel mileage.
I'm keeping my KDX, the KTM is about to be sold to this kid I give lessons to, I'm 43 have so may injuries after 25 years of MX so I know I'm in the twilight of my racing, I did it this year cuz my boys started to any I figured I'm there anyway. Maybe next year will be my last, them I'm thier mechanic, (I do it now!!)
Tough choice.Let me know the final answer.
Joe
2001 KDX 200
200KTM 200
2001 Yami 125 TTR (Boy "A"s)
1996 Honda XR 80 (Boy "B"s)