It has been a well documented modification to replace the 18inch front wheel from the VX800 with an 17inch front wheel from another bike.
One of the donor bikes used has been a GS500e which I understood to be a straight replacement - so when a cheap GS500e wheel appeared on eBay I decided to give it a try. The wheel, from a '92 bike, duly arrived, in dirty but otherwise good condition, the rotor needing replacement (as it was advertised)
View of the right side - note spacer hole in centre
View of the left side - note speed drive gear in centre
The GS500e has the rotor on the right side and and the speedo drive on the left - whereas the VX800 has both on the left - so just turning the wheel round wont work.
However round the centre there is a plastic cover which can be easily removed
Using a screwdriver just lever up and off the plastic cover
To reveal another set of rotor bolts - on the correct left side
Fit on the rotor on the left side
and the plastic cover on the right
There - it fits perfectly with no machining or special parts
The GS500e wheel takes a 110/70 by 17" wheel so the speedo gearing will be wrong - so just fit a GS500e speedo drive to get it right