Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: Valve Adjustment  (Read 697 times)

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  • Offline speighty58

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    Offline speighty58

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    Valve Adjustment
    on: Mar 27, 2022, 09.08 pm
    Mar 27, 2022, 09.08 pm
    Hi peeps,

    I've had the trophy for about 18months now and its hit the 30k mark.

    I thought being as I have a bit of time, and not 'trusting' the dealers, I'd check the valves, so I have a bit of peace of mind.

    Well, I'm more that a bit concerned with what I have found.

    All the intakes were just on the .10mm - which was fine.

    All the exhausts were well below min spec. of .275mm eg:

    .23 / .23              .20/.20             .23/.20

    Pulling the shims and measuring what was already in means I have to get shims well below the minimum size of .170mm I can find on any triumph website.
    I need:

    3 x .145mm and 3 x .120mm

    To get back to the fully open end of the tolerances eg .325mm

    I can find some at these sizes from Wemoto - I just wondered:

    a) has anyone gone below .170mm before
    b) any alternatives ?

    Im guessing on future services I'll be pulling the head and either grinding the valves or replacing all 6 ...
    Last Edit: Mar 27, 2022, 09.10 pm by speighty58

  • Offline digital   es

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    Re: Valve Adjustment
    Reply #1 on: Mar 27, 2022, 09.31 pm
    Mar 27, 2022, 09.31 pm
    I don't know if it was well understood. But...

    If you get those values, it means the tappets were too far apart from the camshaft cams.

    In that case, you should increase the value of the diaphragms.

    With that value obtained, you may have noticed that depending on the gears of the bike and especially on climbs, the valves made noise. Did that happen to you?
    Only motorcyclists know why dogs stick their head out the car window.


  • Offline speighty58

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    Offline speighty58

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    Re: Valve Adjustment
    Reply #2 on: Mar 27, 2022, 11.04 pm
    Mar 27, 2022, 11.04 pm
    Hi Digital,

    I might be misunderstanding you.

    This is exhaust valves ONLY.

    All the exhausts were either .200mm or .230mm -
    with the minimum spec being .275mm from the manual.
    So I see that as the gaps being too small between bucket and cam lobe.
    Meaning I need to decrease the size of the shims to make the gap bigger ie .between .275mm & .325mm


    And Im was very surprised as I didn't consider the engine noisy at any point.

  • Offline digital   es

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    Re: Valve Adjustment
    Reply #3 on: Mar 28, 2022, 12.17 am
    Mar 28, 2022, 12.17 am
    Only motorcyclists know why dogs stick their head out the car window.


  • Offline Coconut   gb

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    Offline Coconut

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    Re: Valve Adjustment
    Reply #4 on: Mar 28, 2022, 10.19 am
    Mar 28, 2022, 10.19 am
    speighty,

    STOP !

    I haven't had to do the Valve clearances on my own Trophy yet, but from Reading your Post
    I would suggest going back and double checking EVERYTHING again !

    You said : "I have to get shims well below the minimum size of .170mm I can find on any triumph website."

    The minimum size available ( From Triumph for the Trophy engine ) is actually 1.70mm not 0.170mm !

    Do you have the decimal point in the wrong place for other sizes quoted ? :084:

    e.g. If the measured clearance was 0.200mm, with the specified clearance being 0.275 to 0.325mm
    then you would need a shim that is 0.325 minus 0.200mm = 0.125mm smaller than the currently installed shim,
    to achieve that 0.325mm clearance.
    ( Or 0.075mm to 0.125mm smaller than the currently installed shim
    to bring the clearance within the 0.275 to 0.325mm specified range ).

    You didn't mention what the measured sizes were of the currently installed shims - what are they ?

    Provided the currently installed shim is 1.825mm or larger, there shouldn't be a problem,
    as you could replace a 1.825mm shim with the smallest available 1.70mm shim to achieve the 0.325mm clearance,
    and still have a further 0.05mm allowance before hitting the minimum specified clearance of 0.275mm
     
    ( 0.325mm required clearance minus 0.200mm current clearance = 0.125mm smaller shim needed. 
    1.825mm current shim size minus 0.125mm = 1.700mm replacement shim available )

    Hope this helps !


  • Offline digital   es

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    Re: Valve Adjustment
    Reply #5 on: Mar 28, 2022, 08.45 pm
    Mar 28, 2022, 08.45 pm
    Thanks Coconut for that clarification, I commented that I didn't know if I was understanding it correctly, it could be because of the language translator, but wow, those measures weren't adding up to me.

    As Cocunut says, it is necessary to measure the clearance between the cam of the camshafts and the tanks, so once the diaphragms have been extracted, it is necessary to measure their thickness, since it is essential to make the necessary calculation and know the value of the diaphragm. to place, whether new or one of another valve as long as it complies with the necessary margins.
    Only motorcyclists know why dogs stick their head out the car window.


  • Offline speighty58

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    Offline speighty58

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    Re: Valve Adjustment
    Reply #6 on: Mar 28, 2022, 09.21 pm
    Mar 28, 2022, 09.21 pm
    Hi guys,

    You were right , I couldn't seem to get my head around the numbers last night, don't know where my brain was.

    Went back over the numbers this evening and ordered the right sizes.

    Thanks for the 'WTH' check  :745:

  • Offline Coconut   gb

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    Offline Coconut

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    Re: Valve Adjustment
    Reply #7 on: Mar 29, 2022, 01.12 pm
    Mar 29, 2022, 01.12 pm
    Thanks for the update !

    Glad to have helped you get this sorted,
    and that you didn't end up with some REALLY thin Shims,
    and way to much Clearance !  :008:

    Cheers  :821: