William, if you have the money, check out an E-line carbon fiber pipe guard. Very sleek and lightweight. If you want to save a few bucks and don't mind a little elbow grease, try a Moose pipe guard. That's what I put on my 200. Very thick (about 1/8") aluminum, and it takes some effort to bend it to shape. I already had a small dent near the top of the header, and decided I'd better put a guard on before I trashed the pipe.
FC-- If I may offer some spodely advice from one who's been there? I'm re-adjusting to my KTM as well. While the suspension was out getting re-valved, I rode the KDX around quite a bit, and, ashamed to say it, got used to it again. Put the KTM back together, rode it, and it kicked my butt. The XR, and to some extent, the KDX are lazy bikes that will let you get away with some sloppy habits and not punish you. The KTM, however, is more finely tuned, and it reacts to every little input. Think about riding the KTM the opposite of your XR. On the XR, you hang back a bit to keep the front end light. On the KTM, you need to get over that gas tank, otherwise the front tends to get squirrely. Use your knees to hold on to the tank. I find using my knees more cuts down on the extra arm pump I get with the KTM. Practice slipping the clutch to control traction to the rear wheel-- especially critical for gnarly hills. You're at the point where you need to un-learn some of the habits you developed on the XR. The XR's are very good at slow to moderate speeds, and the KTM is good at higher speeds. Sure, you can lug the KTM around and trail ride, but it is a bike that is happiest working at it's full potential.
Now, that being said I have to go work on MY technique. Sometimes, it's a heckofa lot easier said than done. :think