So turned out the Rune HAD ITBs on a GL1800 motor... Hmmmmmm.....shipping off some cams to Web to see what they can do with them, and doing some flow work to make it breathe better sounds like it could be fun. I read somewhere that the cams in these have 0 overlap and pretty moderate lift. So modified cams, a bigger exhaust, and either some port work or more realistically swapping to some sort of ITBs could be an awesome result on this bike. Finding high compression pistons without going totally custom would probably be a chore, plus all the wiring and working out a Megasquirt or Speeduino basemap would take some time...
Honestly that Nitrous is looking better and better all the time..
2005 Honda Goldwing GL1800 NRX1800 VALKYRIE. All used tires have been inspected and are free from any plugs, Patches and punctures.