I am researching my combined retirement and birthday. For when I am 66 to do the full Route 66.
There is a company called Orange and Black who do self guided tours.
I was expecting that Harleys would be the only weapon of choice, however pleasantly surprised that the Interceptor or Continental is included in there list of available of bikes.
https://www.orange-and-black.co.uk/destinations/usa-motorcycle-tours-and-rentals/usa-motorcycle-rentals/
Drove Route 66 once complete, and several other occasions parts of it.
Next year planning to drive it with my son.
I always prefer a rental car.
1- Much less expensive compared to a bike.
2- Long stretches of Route 66 are just plain boring, so better in a car with companion and radio...
3- In summer, most parts of Southern Route 66 are very, very hot, it's dessert, remember, so an A/C equiped car is great!
4- We always buy lot's of clothing at several USA outlets, so a trunk is handy..
5- Almost the only bikers along Route 66 are tourists, wonder why...??
And last but not least, do your homework, research every aspect of Route 66, otherwise you may be dissapointed in what you will (not) see...
Happy Traveling, RoadWarrior!!