Using this KA100 airbox rain cover is easy. First, make sure the top of your OEM KA100 airbox is clean. Then, place the rain hood on top and use the mounting O - ring to secure it in place. If you've got the complete kit, connect the rubber boot and hose clamp as per the normal setup. When it comes to maintenance, after each use in the rain, take off the cover and dry it thoroughly to prevent mold. Store it in a cool, dry place. Remember, don't force the cover on if it doesn't fit right, and always check the O - ring for any signs of wear or damage.