Forgot to mention that I also have the full stock KTM exhaust system for this motor which is actually a pretty decent exhaust for OEM. Thought this might be helpful if anyone contemplated putting this motor in another frame.
A couple pics of the exhaust, just has a little dirt on it and no rust. It cleans up real nice, just haven't had time but I should be able to tomorrow. The header tucks in real tight so it shouldn't be to hard to make it fit.