As Gert mentioned not every bike will have premature stator failure. Reading the all the posts on the subject will make you think it must plague every bike, but remember, you only read about the failures. I have an '09 with 83K miles with the original stator. My guess, it's only a guess would be 10%-25% of the bikes have this problem. It's not a hard fix, just inconvenient if the bike leaves you stranded. If the bike you're looking at has 84K km, either the stator has already been replaced or the bike just didn't have a stator problem.
The only other issue with these bikes is headlight failure, which eventually happen to most, if not all bikes. Hopefully someone else can give you a more technical/accurate description, but starter & headlight voltage run the through the starter button and eventually burns out the contacts. Adding a headlight relay fixes the problem. A company called Eastern Beaver sells them, easy to install.
Any update on your purchase?
2009 Wee Strom ABS (current)
1987 Harley FXR Low Rider Sport (current - with 206K miles)
2009 Aprilia Mana 850, 2006 SV650, 1984 Yamaha Virago 1000 (all sold)
Silver Strom Club Member #11
Wee Farkles: Russell Day Long Seat, Madstad with Moose Adventure Shield +4'', SWMotech Centerstand, 1'' up & back bar risers, Givi XS308 Tankbag, Aprilia mirrors, Framesliders, Fenda Extenda, Elka Shock.