Metzeler ME880 info
Metzeler makes the ME880 for large, loud, chrome-bedecked American V-twins, as well as touring bikes. Given that, you may run across some color schemes while you're shopping that you may not want for your Ninja. Here's a guide to abbreviations used by some websites:
ME880 Marathon is what you are looking for. It will be a bias ply blackwall. If you have any doubt, pick up the phone and call your retailer.