I think any year. If i remember right it's not a direct swap but putting the 535 internals into the 650 housing/drive. Check over on the 650ccnd forums as i think there is a write up on itin the modifications section.
07 vstar 650 midnight custom
Ais disable, 4.5 inch risers, V&H cruzers, jetted with pods, viking saddlebags, Kuryakyn mini boards and memphis fats windshield, fuel solenoids deleted, star solo seat and 4 inch extensions. Boss audio sound system.