You will also want to check the belts and replace the fuel filter. Since it seems the previous owner neglected the bike a little.
Usually the belts should be replaced around everything 12k miles. Unless you have some maintenance records for the bike laying around, it would be cheap ($100+) insurance to replace the belts. Definitely replace the belts if the edges are wore or there are any tears.
The fuel filter should be replaced every 6k miles IIRC. Its a $15 part and if it gets clogged your bike maybe experience the synonyms you described. But it is probably one of the problems mentioned above.
As for manuals, check out LT Synder's desmodue book and the Haynes Manual. You can get both at
Motowheels.
I believe LT synder has stopped printing his desmodue manual since it is listed as sold out on his site. But it looks like motowheels has 3 copies left. I would pick up both manuals. They each excel in different areas and really compliment each other.