What's the service record on this bike like?
Splurge on basic maintenance items, new filters, engine oil, fork oil (tho it is now a major pain & full fork removal is required...), pop in new clutch plates + friction discs + springs, brake pads where required, brake fluid drain & refill. Do the spark plugs too while you are replacing the air filters. A new/upgraded chain would not hurt either....unless you are 100% confident with what the previous owner said/did.
Having the wheels & tires looked at is something I highly recommend. Honestly it is probably best to start with new rubber...it is after all the one thing that connects you to the road. Have the bearings inspected/cleaned/lubed/replaced. The steering stem bearings deserve a good looking over, if the previous owner was a huge yobbo & tossed the bike down after a wheelie there will definitely be some premature wear there. Replace with needle bearings if they are toast.
A PAIR block-off may be helpful to you...I suspect that's been done already though.
If you've got bunches of too much $ kicking around you could buy yourself a set of Takai Coil On Plugs...