Voltage Regulator and Rear Sprocket

[minieggroll]

I'm not sure if the rear tire has been replaced or is still original. What tires came on the GZ in 2007?

I just bought the bike. Where should I hook up the multimeter to check (any pics or page reference to the repair manual would be awesome).

Could I take it to Advanced auto parts and have them check the battery out? Iron Pony said the battery was fine when I asked them.