The coil is behind the coil cover. It's the big chrome bell hanging between the cylinders on the left side of the engine. On your bike, you will have to remove the left tank to get the top motor mount bolt out. I'm not sure how you test a coil. I would probably just remove the spark plugs, then put them back into the spark plug wires. Then hold each one against the heads, and crank the motor over. If the coil is working, you should see both plugs sparking.