I have a 1977 C1 650 I built for touring, it has a 1982 Spectre 750 motor in it I converted to chain drive. I had to make spacers on every end where the motor attached to make up for the later engines flex mount system. I used some 1990 Ninja 750 CVK carbs on it I respaced, it used regular GPZ750 intake boots. The fairing is a Vetter Quicksilver and the hard bags are Shoei which I used to build up a custom top rack.
I am still sorting out some issues so have not done any long trips on it, it does ride nice and has plenty of power. When I picked up the 750 shaft motor I was hoping it would fit in the chassis but I later found out the 750 chassis is about 2" wider at down tubes where the output shaft sits to accommodate the drive system.
Your Corbin looks alot more cushy than mine
Even with the gel in mine I puss out after 200 miles
but way better than the stock LTD seat
Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn