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Thread: 4 degree key?

  1. #1
    Altezza01's Avatar
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    4 degree key?

    would a 3 or 4 degree key be better with my setup? my setup is in my signature. james is giving me his 4 degree but wasn't sure if that's too much.


  2. #2
    mtrager's Avatar
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    You should not re use a keyway according to the Yamaha shop manuel.

    I know people will say you can. I also know of people who have had problems doing it.

  3. #3
    Altezza01's Avatar
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    i just looked at the yamaha manual and it does not say that you can't/shouldn't reuse the key or the woodruff key as the manual refers it to. i know if you don't install it right (make sure it's all the way in) then it can cause problems.

  4. #4
    philip_gpr's Avatar
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    if you already have a 3 degree installed I wouldn't bother swapping it out for a 4 degree - that is a lot of work

  5. #5
    4, you have no head so your compression is very safe letting you safely use more timing.

  6. #6
    Altezza01's Avatar
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    the 3 isn't installed. i'm swapping with james...his 4 for my 3. the 3 would benefit him more. i plan on getting my head shaved later on.

  7. #7
    flyboy's Avatar
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    the 4 is too much for my application. i'm going back to the 3 and giving Altezza the 4 to install in his skeet-skeet

  8. #8
    mtrager's Avatar
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    I would ask Wfo . He has worked with different keyways. Also ask him about running that much timing without a free flow.

    Remember, non powervave motors have more timing at wide open throttle than powervalve motors do.

    My manuel is 2003 and it says do not reuse keyway. Maybe you can on new ones. And as I said , everyone says its fine.

  9. #9
    WATER WOODY's Avatar
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    I HAVE A REALLY COOL LOOKING 7 DEGREE KEYWAY! I used it at my elevation.Seemed to work good @ 5000' but 4100' was a little much.

  10. #10
    Altezza01's Avatar
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    holy crap!!! 7 degree! is it on your 1400?

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