2008 sx-f 250 hard to start

[fireman]

Hi Guys, I have just purchased a 2008 KTM 250 sxf. this is my first KTM, and I am really excited to own one as I really enjoyed a 2006 model that i have borrowed previously.

Now, I have a problem that seems common to this bike. It hates to start. From cold or from hot. I can kick it 50 time and still not get it to start.

New plug (spark is present)
Clean air filter
new fuel (petcock on of course)
new oil (at proper level)
stock exhaust and presumably stock jetting
I was told that the valves were done 10 hrs ago (bike has 50 hrs on it, with 10 hrs on a new top end)

I start with the choke on, kick till I am blue in the face. Sometimes it will catch and it purrs like a kitten. if I let it warm and then try and restart, it still does not want to start.

Any thoughts? Ideas? Or even tricks to starting this bike?

thanks in advance.

Justin