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valve clearance variations

Discussion in 'The Garage' started by Jasonsblue81, Jun 1, 2023.

  1. Jun 1, 2023 #1
    Jasonsblue81

    Jasonsblue81 colorado Kid

    64
    2
    8
    colorado
    Hey guys. getting ready to check valves for first time. on my 1981 400. been reading some posts on different peoples settings. seems to be alot of discrepencies on what spec actually is for the clearances. what does original manual say??
     
    Jasonsblue81, Jun 1, 2023
    Jasonsblue81, Jun 1, 2023
    #1
  2. Jun 1, 2023 #2
    CaptChrome

    CaptChrome XS400 Addict Top Contributor

    377
    140
    43
    Southern NJ
    Intake: 0.08 – 0.12 mm
    Exhaust: 0.16 – 0.20 mm

    I usually set them on the high side of these ranges as the clearances will close up with normal wear.
     
    CaptChrome, Jun 1, 2023
    CaptChrome, Jun 1, 2023
    #2
    tstidham likes this.
  3. Jun 1, 2023 #3
    tstidham

    tstidham XS400 Addict

    207
    87
    28
    Philadelphia, PA
    When I set mine, I aim for the middle. Then check with the tightest and loosest feeler blades after locking the nut. It usually changes a tad no matter how careful you hold the adjuster bolt while tightening the lock nut.
     
    tstidham, Jun 1, 2023
    tstidham, Jun 1, 2023
    #3

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