This Royal Rod crankshaft is a perfect fit for Yamaha YZ250F motorcycles manufactured between 2014 and 2018. It comes with a 1-year manufacturer warranty and is an OE/OEM part number 55630307100. The packaging should be the same as what is found in a retail store, unless the item was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. This crankshaft is a genuine product from the manufacturer and is suitable for use with Yamaha YZ250F motorcycles. It is made of high-quality materials and is designed to provide reliable and efficient performance. If you have any questions or concerns about this item, please refer to the seller's listing for more information.