Hello there. I swapped my stock exhaust and put V&H pipes on my 650 Classic and have some comments I can share (sorry, not specifically for the ones you are looking at though, but I hope you find them helpful.
1. Putting in the new pipes was very easy. Just battling a bit with aligning the holes to put in the screws, but nothing that was complicated just required some care.
2. I did NOT rejet my bike. It does run hotter and I can see the pipes (especially the back one) very blue. I was warned that if I did not rejet my carbs this would happen. I still want to rejet them, but am looking for a local mechanic to help as I hate the idea of buying the kit for $80 and then throwing everything away except for like a $5 piece.
3. Vibration on the bike increases A LOT. I have found screws almost falling out so periodically I have to go over the screws to ensure all are tight and in place. I imagine if you get the short pipes, you might even have more vibration, but not sure on that one.
4. Sound is enchanting! Sounds sweet. Not a Harley, just it's own special, robust deep roar.
Hope this was helpful. If I can help in any other way, please do reach out.
'97 Toyota Land Cruiser
'05 Yamaha V-Star 650 Classic
Vance & Hines Exhaust
'05 Yamaha Roadstar 1700