Where is the battery located on a 2005 kawasaki concours 1000? and how would i go about charging the battery? or does it have to be taken to the shop? bike has been sitting in the garage for over 6 months, hoping to sell it. any other tips would be greatly appreciated

The battery is located under seat just remove seat and thaere you go

I don't know 100% for sure where the battery is but typically on Japanese bikes they're under the seat. You can charge it yourself using a motorcycle battery charger. Sears also sells a charger that's good for cars and motorcycles and will condition a battery that's sulfated. Changing the gas in the tank would be a good thing to do to help prevent the possibilities of fuel related problems rearing up when you show the bike. Other than that, a good going over before you put it on the market is a good idea.