I'd like to question the logic of some riders that mount their highway pegs on the horizontal bar section of the engine guards. I guess they are never expected to ride on tight curves of mountain roads and if they do, they'd ride at such a sedate pace, not to scrape the mounts, to actually make it a boring ride.
The lean angle of the Goldwing is already so compromised by its massive width, why add something to that width by having the highway peg's mount scrape before anything else? Or worse, unload the weight off of the front tire?

4:
I mounted my highway pegs to the vertical bar section of the engine guards clearly away from coming in contact with the road surface in a very tight turn.
It's your bike, and your safety, but perhaps you might want to reconsider your choice of mounting locations.