I picked up a seized 2001 KTM 250 a few weeks ago, and put my 2001 380 EXC motor into it. Spent past couple days jetting and riding. Gobs of power, feels like a big 4 stroke for power delivery. King of wheelies...
Scary bike, like a loaded pistol, watch where you point it. Starts easily and usually first kick.
My other 2 stroke passion is Yamaha Blasters. I have one with a KTM 250 engine and have helped my son build a few. This is my 240cc bored and stroked Blaster, fittingly finished for me by my son a while ago.