How do i change spark plugs on a 2006 boulavardc50

You have to pull the seats and gas tank. Thenlike a car you pull the pug wires. The front cylinder's is on the right, rear's on the left. Your tool kit has a special tool designed to reach all the way down to the plugs. On the rear you can use a rachet and socket, while on the front you must use the supplied wrench in the tool kit because of lack of room. Make sure its cooled off so you don't strip the threads out and blow some compressed air to clean any trash out.