I just checked on eBay for late model 1800 Goldwing swingarm assemblies and the final drive as a separate part for sale.
I see almost brand new swingarm assemblies for $200 to $300 and the final drive BB itself for under $50.
These units have a retail of several thousands of dollars.
But because of the Baby Boomers that ride bikes here and are at an age where they feel less comfortable trying to hold up a 1200# bike, the Trike conversion industry is booming. There is literally a glut of these Honda drive parts on eBay.
I did some research on the Liberty Ace and could find some things about them, but there really isn't a lot of information out there. I did find some pictures and has been said above, the right side seat is narrower than the left due to the swingarm being a right side drive for the driveshaft.
But I bet that Larson had no issues with his rear drive and they were all whisper quiet. As the assembly you get a pre-engineered rear brake system that has been on the road for years. You also get to have the wheel bolt on like a car and no need to remove an axle to remove the wheel.
