Thanks for the replies! I guess I should mention that I'm looking at buying a used bike, and with so many of them, I thought that the knowing what the common add-ons/changes are, it COULD help make a decision on which bike to buy. (all other things being equal, the farkles/changes may be the deciding factor in the purchase).
Important point. So you want to know which farkles would really improve a used FJR enough to help swing the choice--or add enough value that they'd justify a decision if everything else was more or less equal.
In that case, I'd think about what items are more or less universally valued, and which ones are a matter of individual preference. So an aftermarket seat or windshield, while very desirable, might not be right
for you, since you might have chosen a different one if you decided you wanted it at all. Many are very happy with the stockers. Same with exhaust mods. Some like the quiet note of the stock pipes, others want more of a growl (plus you can change the exhaust note REAL easily for almost no cost. Google "Trooper Mod.") All of the things I've named so far are fairly expensive, too, but
for you, then might not justify choosing a bike with one or more of them versus a similar bike without them at a lower price. Follow me?
Some things
I would consider fairly "universal" in desirability (and keep in mind no two folks here would come up with the exact same list):
1. Lighting upgrades. Good safety item, for seeing and being seen. Both front and rear. There are many many threads about which are preferred by lots of folks, and why.
2. Heated grips. Very nice if you ride in cold weather. Ever.
3. Certain electrical mods are very useful and not awfully expensive, but if you aren't really electrically savvy, it's nice to have them on the bike already when you get it. Included are things like outlets or connections for various gadgets, like a GPS, communication system, air pump or radar detector. Also some fairly small things like a fuseblock, and voltmeter.
4. If it has a good locking topcase (OEM or Givi in particular) included in the sale, that's a pretty expensive and very useful item.
I'm sure I could think of other items to add to that list, and I know others here can too, but in general, the more "personal preference" items should be added only when you yourself feel the need after riding it a while. Hope this helps.