My experience with the KDX is that its easy as to start. There are two different starting techniques you need to know. This is true of any 2-stroke.
1) cold start. So choke etc, no throttle (maybe a little if required), neutral makes life easier depending on the bike. Kick a few times. Let it idle a bit to warm up, don't rev it hardout when cold. Ride a bit with/without choke depending on bike and temperature etc.
2) warm start. You've just stopped/dropped it and now you need to restart it. Easy! Grab the throttle, wind it out to about 75%/100% kick it over. It will start easy as. Depending on the bike you may need to put it in neutral. Mine starts in gear most of the time.
Doing this perched on a steep hill with one foot on the ground for you shorties may be more difficult

I can easily get both feet flat on the ground on mine. Infact I'm thinking of getting a built up seat as mine is slightly uncomfortable with the raised bars when sitting. Bout right standing though.
I've dropped the needle in mine as it seemed really prone to fouling plugs when I first got it. However, in retrospect it was probably me just getting used to it. I should probably put it back to standard but I've never got around to it.
Welcome to world of 2-strokes that you can tractor around with.

Bookmarks