Prior to fitting, lubricate o-ring with just enough silicone grease to give a glossy finish. | Note the Keihin 'K' marking on the OEM part. If your part does not have these markings then it is most likely a 3rd party product. For example, a Keyster brand part. Our o-ring is made to suit the genuine Kawasaki float valve seat and is not suitable for the Keyster part. |