Yes, I have looked at the GB 500 since it came out. Nice bike! One thing and it is minor to many, is the dual pipes coming out of the head. Make for a nicer bend will making them, but kind of takes away from the classic look. I had a '72 XL 250 back in the mid '70's that I just LOVED! It was a super reliable bike that I still miss. My friends, after I bought that 250, all went and bought '74&'75 XL 350's. They were just as good, but faster and more low end grunt. In time I went through the XR350R's and they have the same pipe arrangement as the GB 500. I had thought about using that motor but the pipe arrangement. The XR's were SUPER. I never had a problem with them either. Health prevents me from dirtbiking or I would still be doing that. But, I still love my motorcycles! I need to figure out how to post what is in the garage now, but this XL350 had been on my list. I have restored mid 60'sTriumph's and the CBR, but now it is time to do something I haven't done before. Kind of build a bike, instead of restore one. The side port intake, kind of duplicates the British bikes, so that was on my list. The rest is just doing some butt scratching trying to figure out how and what parts will team up well together. Another thing , that probably sounds silly. I want to do it with all Honda parts. Other of course such things as exhaust, tires, etc. Still in my garage is a Bridgestone 175 DT, like I bought new in '69, the '73 K3 Honda 750 that I did buy new and the '81 Goldwing that I bought in '81 also. Here is a couple years ago, before health made me sell the XR and I should not have sold the CBX!