Well, I moved Little Spitty out to the car port for winter storage & moved the GoldWing into the garage.
Disassy'ed rear of bike, removing tire, brakes, pipes, shocks & trailing arm.
Cut the bag support off leaving only the trunk support.
Rolled in the Miata rear end & checked drive shaft clearance. It's a little tight, but I won't have any up/down movement on shaft.
Have an idea on how to mount rear to bike frame uasing some 2"x3" tubing I have laying around.
Plan to add fuel tank on top of rear end.
Not sure on wheel base as yet, will be what the drive shaft will gave me.
Still need to work on gearing ratio down to at least 2.93:1 which is same as bike.
Thinking maybe a BMW diff.
The tires are 4-100mm x 16" x 8" rims.
Any ideas please post, could help me not make mistakes.