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    Installing valves

    All my valves, save for one, need replaced. I ordered some valves online, they came from another bike. In this instance, I'm guessing I will have to lap them, to ensure a better fit with the seats. Is lapping difficult? Well, a better question in my case is: how easy is it to screw up?
    1980 GS550E

    #2
    Success will only be possible if your second hand valves are all straight I would use the hand method with the rubber sucker it's not hard to do search YouTube and you will get the idea on how to do it start off with fine grinding paste important. when you have done grinding in all the valves make sure you clean the head throughly so every bit of the paste is removed.
    The big guy up there rides a Suzuki (this I know)
    1981 gs850gx

    1999 RF900
    past bikes. RF900
    TL1000s
    Hayabusa
    gsx 750f x2
    197cc Francis Barnett
    various British nails

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      #3
      If you don't have the suction cup tool, you can put the valve through the guide then slip some rubber tubing
      over the valve stem. This will give you something to hold as you spin the valve.

      Mad
      83 GS750E
      2006 ZX14
      2004 KTM 450 EXC
      2001 Yamaha Big Bear

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        #4
        http://members.dslextreme.com/users/...LAP_VALVES.pdf -This is on Basscliff's site
        sigpic
        Cowboy Up or Quit. - Run Free Lou and Rest in Peace

        1981 GS550T - My First
        1981 GS550L - My Eldest Daughter's
        2007 GSF1250SA Bandit - My touring bike

        Sit tall in the saddle Hold your head up high
        Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
        and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

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          #5
          When lapping, which cuts down faster: the valve, or the valve seat? When I just set the valve in the seat with no springs or keeper and shine a light under it, a tiny bit of light shows through. It looks like more the valve seat than the valve.
          Last edited by ZombiePotatoSalad; 03-28-2021, 02:43 PM.
          1980 GS550E

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