I know this is an old post but I just put the item number into Ebay on the off chance that the page might still come up - that's a really nice conversion - I'd like to see it with the panels off to get an idea how it all fits in as the clearance for the carbs must be fag paper thin, and filters?
Just for a laugh I stuck my RC600 frame onto a good CBX750 motor I just happen to have on the bench..............it don't fit obviously but with a bit of Harris Magnum style perimeter frame tube bendery it could. Air/oil cooled 90bhp in a very compact package.
My Nordwest/Husqvarna hybrid idea is too problematic but this, this has less issues oddly enough.
No, I'm not on drugs, but yes, my imagination is out of control.
Cheers
Phil