Comparison EXC to KDX
Cman,
As DB Dave pointed out they are very different machines. I enjoyed my KDX for years and started seaching for more...more power, better suspension, etc. My KDX was very reliable and wasn't finicky about jetting (never ran stock though), but I just needed more.
The KTM would eat my KDX for lunch. My 300EXC has been very reliable and easy to work on. The KTM is more finicky about jetting than the KDX. As Dave points out some parts are more expensive for the KTM. I had my KTM suspension revalved, etc. to make it even better for me.
If you just want to ride and ignore your bike the KDX will tolerate that longer than the KTM, but with a little attention once in awhile the KTM will reward you with performance. :blah: