Here’s one for ya all to think on. If I was going to take an interstate/month long ride somewhere, on a 20-40 year old bike, and I didn’t have one (or 5 bikes) in my stable. It would hands down be a 1500 (given just those 2 options). Once you leave the stable, and have serviced all those scary things like timing belts (need to do them once in 50k), carbs (neglecting them for storage is the biggest culprit), tires and such. The thing will run that month trip like nothing, and want to do it again. Sure the 1800 will to, until the ADG (alternator driven gear) pops, or it ghost shifts (because of worn synchros on those high/low synchronizer dogs), or it snaps the ecm from bad wiring design (grounds in the sensor circuits/ look up Zombie hack for ECM ).
Yes I have the 05’ 1800, but I tell ya, there was nothing more satisfying than looking in my mirror and seeing my son on the 95’ 1500 right there, no issues, ever !! I was more concerned about the 1800 doing something than that 1500. I had gone through his 1500 from end to end when I/we purchased it. Alt rebuild, forks/steering head bearings/driveshaft serviced/all fluids-filters-belts replaced/added some lights and replaced all the bulbs/tires-with stems. It is/was bulletproof. At this point in my life, I might just hop on a 1500 if the 1800 couldn’t be fixed. There are more points of discussion, but I’m stopping here, that show why Honda built the 1500 the way they did. And how it was the epitome of touring bike design. Too good, in fact. Look at all the high performance in the 01’-17’’s, then look at the design parameters in the 18+’s. They surely got away from the build spec’s they had when the 1500 was being developed. The 1500 will still be around when no ECM’s or transmission parts, etall, are available for the 1800.
Two brothers drop by once in a while, both are well over 61/2 feet tall. One rides an 1800, the other rides a 1500. Neither one speaks of being cramped and are happy with the bike they ride.