Ryco Motorcycle Oil Filter RMC 117 (KN - 144) for Yamaha Part No. RMC117 Oil filters work in a multi-pass system that allows engine oil to continually pass through the filter and remove dirt. A vehicle’s entire oil supply is filtered between four and five times every minute and their function is to allow only clean filtered oil through to the engine. Ryco oil filters are designed to meet or exceed the vehicle manufacturer’s specification and provide optimal filtration for the specified service interval. Ryco achieve this by measuring the three critical areas of efficiency, life and flow. About Ryco Ryco Filters are aftermarket products with an outstanding industry reputation. They are all created to surpass the quality of original equipment manufacturer specifications. All Ryco products are tested in Australasia’s only dedicated filtration laboratory to ensure their quality and performance. This laboratory serves as Ryco’s “engine room” as it pursues excellence in filter technology. All Ryco Filters are created to perfect three critical areas - flow, life, and efficiency. The performance levels of these filters are superior in the industry and exceed the ISO and SAE international industry standards.