So be careful with the buyer. The OEM tail is threaded to accept a propeller in the tail. However, this piece is not. A standard bolt won't even fit the holes, so you can even buy a nut. You will need to use a smaller bolt/washer/nut if you want to install this on your Ninja 400. Edit: I'm updating to 5 stars as I didn't see the included hardware initially, it fell to the bottom of the boxes.
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