As a former Honda service rep. I would recommend you use the Honda Moly 60 for your 86 Goldwing.
You should be able find it any Honda dealer.
3 oz tube is $10 to $12 dollars.
Do Not use Moly 60 on plastic, especially styrene, it will erode these materials.
If you don't to care to spend the money or a dealer is not close by, you can use a quality synthetic grease like Mobil or Amsoil synthetic grease. Just clean up the splines well before applying the new grease.