Hi Mikoooo and Norm,
If the GXV120 is mounted on a honda base , which it more than likely will be, the shaft diametre will be 22mm, not 7/8" so your standard masport , rover etc boss won't be a snug fit, so you'd be looking at a genuine honda setup for the right fit.
Cheers, Ted
Last edited by bigted; 08/03/19 10:28 PM.