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1981 XJ550 Seca Valve shim job

Discussion in 'XJ DIY How-To Videos' started by ecologito, Oct 6, 2014.

  1. ecologito

    ecologito Well-Known Member

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    Additional info by Chacal:

    Also, the valve shim clearance are the same for all the XJ-series bikes except the XJ700-X (waterhead) models, and the XJ1100's:


    Valve Clearances:
    -always measured with engine at "room temperature":

    550:
    Intake: 0.11 - 0.15mm ( = 0.004 - 0.006")
    Exhaust: 0.16 - 0.20mm (= 0.006 - 0.008")

    650 all x. Turbo:
    Intake: 0.11 - 0.15mm ( = 0.004 - 0.006")
    Exhaust: 0.16 - 0.20mm (= 0.006 - 0.008")

    650 Turbo:
    Intake: 0.11 - 0.15mm ( = 0.004 - 0.006")
    Exhaust: 0.16 - 0.20mm (= 0.006 - 0.008")

    700 non-X:
    Intake: 0.11 - 0.15mm ( = 0.004 - 0.006")
    Exhaust: 0.16 - 0.20mm (= 0.006 - 0.008")

    700-X:
    Intake: 0.11 - 0.20mm (= 0.004" - 0.008")
    Exhaust: 0.21 - 0.30mm (= 0.008 - 0.012")
    NOTE: special tapered-point feeler gauges needed due to extremely cramped working environment on these bikes; also, the X-models use a unique valvetrain that uses "pads" rather than "shims" and basically takes all day to perform the check, and about as long if you have to replace any of the pads on the 20 total valves!

    750 M/MM:
    Intake: 0.11 - 0.15mm ( = 0.004 - 0.006")
    Exhaust: 0.16 - 0.20mm (= 0.006 - 0.008")

    750 Seca:
    Intake: 0.11 - 0.15mm ( = 0.004 - 0.006")
    Exhaust: 0.16 - 0.20mm (= 0.006 - 0.008")

    900RK:
    Intake: 0.11 - 0.15mm ( = 0.004 - 0.006")
    Exhaust: 0.16 - 0.20mm (= 0.006 - 0.008")

    1100:
    Intake: 0.11 - 0.15mm ( = 0.004 - 0.006")
    Exhaust: 0.21 - 0.25mm (= 0.008 - 0.010")

    And the chart to figure out what you need to get them where they need to be:

    [​IMG]
     
    Indtune likes this.
  2. Ted

    Ted Member

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    Good job man! Funny - I was in the process of making a VERY similar video (with a little more focus on the "zip tie method") 2 nights ago when my phone ran out of memory and locked up on me. :confused:
     
  3. MNafasto

    MNafasto New Member

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    Not according to Haynes manual
    I have xj 650 J - it states that j is the only model with this values:

    Intake: ( = 0.006 - 0.008")
    Exhaust: (= 0.006 - 0.008")
     
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  4. ecologito

    ecologito Well-Known Member

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    That is mistake on the hays, clymer and Yamaha documents. It was later corrected. The chart above is the correct information.
     
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  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    As Eco stated, the manual is WRONG. Check the sticker on the inside of your left side cover. This is one of several well-documented editing errors that are in all of the service manuals.
    Please take great care when posting in the DYI forums to ensure that the information you have is correct.
     
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  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    It was only corrected here, and on a few other forums. The manuals all still have the error and will likely never be corrected.
     
  7. Trotskie_10

    Trotskie_10 Member

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    Awesome Video! thank you
     
  8. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    Manual is wrong, WE are right.
     
    Hand, ecologito and k-moe like this.

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