The Positive Benefits of Oil Ports

You’ve seen them in the top bearing plates once the valve caps are removed: tiny holes. They are known as “oil ports” or “oil holes”, and they allow you to lubricate the top of the rotor directly. Oiling the inside rotor facings is easy, since removing a slide gives direct access to the rotor facing. [...] Related articles: Ask Dave: “Why Do Valves Clank?” K asks, “Why do valves clank and what...

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