Check the chain and sprockets for undue wear. If the bike/engine has been hammered there are usually signs of galling on the sprockets. These engines cannot take doing,"Wheelies" as it drains oil from the top-end leading to possible premature engine failure.
Mad8V from the US forum has done proving work on what happens to this engine when raised above a certain angle.
https://www.youtube.com/watch?v=dWWUpXWjJ-c
As per other post there are some much lower mileage examples around and worth paying for IMHO and as always with 2nd hand bikes if they are in original good condition livery they have usually been cared for.
I watched eBay for at least three months before I saw the SV650 I wanted at a dealer in Newcastle and in 2017 paid £1595 for a 16K( Now on 30k+) miles one in original well cared for livery. It's been a great purchase for me.
Apart from normal consumables the only thing I've had to do was put a new R/R on it
https://cx500.000webhostapp.com/Mosf...sfetUniRR.html
https://cx500.000webhostapp.com/Mosf...orcycleRR.html
and replace the rear indicators with some generic ones off eBay as some Tw*t broke one when it was parked up on a job
Slip-on exhaust was by choice as are the Fender-Extender/Screen/ Hand Guards and Rear-Hugger.
HTH
