Pekingduc,
Jay is it? Do you still have your Hawk? I just bought two of them since I was waxing nostalgic. You used to live in Hawaii right? I had two Hawks back in the early/mid 90s.
Anywho, I have a 05 600RR FE that I am putting on one of them. I have a NXA FE on my MC28. To get that to fit the MC28 I know Charles G. had a custom machined stem pressed into the NXA lower triple. When I get home or when I have a chance in the next couple days, I'll measure the dimensions of the MC28 bearings and the Hawk bearings and see if they're the same. After that you just gotta make sure that the steering stem length and fork length are the same. Although fork length is not as critical.