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  1. #1
    PWCToday Newbie
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    Valve shim measuring onfx140

    The service Manuel doesn't show when and where and to measure the gap on the valve buckets on a fx140 head. The person that tore the motor apart did not lebel where they went so now I have 12 small tiny circle shins that sit on top of the valaves and need to know the process how to measure .. anyone done this?

  2. #2
    PWCToday.com Is My Home Away From Home hyosung's Avatar
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    Re: Valve shim measuring onfx140

    some shims have numbers on them ,most of the time they are worn off , a micrometer is the correct tool to measure shims "however most people dont have one in their tool box , a digital vernier caliper will get you a ballpark sizing , with any luck all your shims will be the same size , post back your findings and someone will instruct you on how to do your model engine,
    2 x 650 sx custom build (my toys) http://www.pwctoday.com/showthread.php?t=425767

    modded X2 650

    stock looking ZXI 900 ""being cannibalized to sponsor a 650 sx build """

    Jerry Rigging is my specialty .....


    Originally Posted by hyosung
    so when you say i """ hammer and slap things together """ this may be so , BUT they are hammered and slapped together SOLID

  3. #3
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    Re: Valve shim measuring onfx140

    Luckily the ski only had 24 hours on it when it hydrolocked.. all the numbers are very visable and I have them all laid out.. I just don't know what and how to measure to where each goes at...

  4. #4
    PWCToday.com Is My Home Away From Home AC 46's Avatar
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    Re: Valve shim measuring onfx140

    What sizes are they?
    R.I.P. Super Sic

  5. #5
    PWCToday.com Is My Home Away From Home hyosung's Avatar
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    Re: Valve shim measuring onfx140

    measure from the base of the lobe , set up a dial gauge and turn the cam, 0 at the exact base of the lobe, you may have to set up so as you are base lobe facing up then mark with a sharpie so as when you turn down to use feeler gauge to check clearances !
    Last edited by hyosung; 09-17-2017 at 02:00 PM.
    2 x 650 sx custom build (my toys) http://www.pwctoday.com/showthread.php?t=425767

    modded X2 650

    stock looking ZXI 900 ""being cannibalized to sponsor a 650 sx build """

    Jerry Rigging is my specialty .....


    Originally Posted by hyosung
    so when you say i """ hammer and slap things together """ this may be so , BUT they are hammered and slapped together SOLID

  6. #6
    PWCToday Newbie
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    Re: Valve shim measuring onfx140

    A little more specific .. kinda confused wht you mean... sorry

  7. #7
    PWCToday.com Is My Home Away From Home AC 46's Avatar
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    Re: Valve shim measuring onfx140

    Haha.what size are they?
    R.I.P. Super Sic

  8. #8
    PWCToday Newbie
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    Re: Valve shim measuring onfx140

    There are multiple sizes ranging from 1(172) all the way to 200 but they vary IMG_1488.JPGIMG_1488.JPG

  9. #9
    PWCToday.com Is My Home Away From Home AC 46's Avatar
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    Re: Valve shim measuring onfx140

    You need to install them re torque cam and measure the clearance.check it 180 from the peak of cam lobe.
    R.I.P. Super Sic

  10. #10
    PWCToday Newbie
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    Re: Valve shim measuring onfx140

    I've never done this before, but you are saying install them and then measure.. do you mean torque down the cams and gen measure the gap between the lobes without the shims inside the bucket? And if so what side do you measure ?

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