Don't have a V-Rod and have only ridden one a few times. Longest stretch only a little over an hour. So can't speak to how it might wear on you over a longer day. For the thousand dollars or much more that had previously heard suggested for prices on larger tanks for them I'd have to think twice (or three or four times) about doing the deed. But for the $350 range mentioned above here how can it be anything other than a no-brainer?
Whether you intend to ride 90 miles or less on a stretch or not sometimes the option just isn't ours. A station might be closed. Might be out in the boonies having a good day and not realize how deep in the boonies you'd gotten. More fuel just can't ever be a wrong choice.
Honestly, Don, for a person my size or slightly taller, I think I could ride on the V all day long, particularly if cruise could be fitted. It's a smooth running bike and could run 75-80 and 5K all day long. But the thumb screw works for the interstate when I need to rest my hand a minute or two. The prices on these retrofit tanks is really dropping, and the guy now has the ability to make them cheaply once he got the original kinks worked out. It is something I might do over the winter or when it comes time to change the rear tire out on mine, as all that comes off anyway from the instructions I've seen with the kit. 1/2 day job and only need one special tool to get the tank collar off the old tank to put on the new...on the Vrod forum, people are swapping the tool, or renting it. 5 gallons is always better to have than 3.7....that would make it a good pee break interval. I'll make the 300 or so mile run to Traxxion in a couple of weeks, so will know better then.