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Valve Facing and Lapping - Do I or Don't I?

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    Valve Facing and Lapping - Do I or Don't I?

    So, in my rebuild thread, Ed (Nessism) recommended I get my valves faced, and firstly this thread is not to second guess Ed because his advice I have followed so far has been flawless.

    However, I've gotten very confused because everywhere I look around the internet and in the Clymer manual etc. I find conflicting information as to whether or not it's safe to face modern valves and if I should lap them in to the seats or not.

    So, is there any definitive answer as to whether it's safe or not to do this or if I should be forking out for new valves?

    I think my main problem at the moment is that I don't 100% understand what is involved in facing... lapping makes sense to me though.
    1982 GS450E - The Wee Beastie
    1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

    sigpic

    450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

    Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

    #2
    Yes, have the valves faced if needed, & yes lap them in before reassembly. Ray.

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      #3
      Thanks for the confirmation Ray, I have this bad habit of over-thinking things that sometimes ends up in me questioning good advice.
      1982 GS450E - The Wee Beastie
      1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

      sigpic

      450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

      Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

      Comment

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