Js550 crank specs?
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  1. #1
    PWCToday Regular b00st's Avatar
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    Js550 crank specs?

    Does anybody have the crank specs for the js550's? Specifically an '85 style. I bought a crank to fix my old 550 engine and would like to make sure everything is where it's supposed to be (like bearing/rod clearances and run-out).
    I can't seem to find this information in any of the maintenance manuals i have or online at all.
    Thanks
    '85 JS550/750: ~Small pin/dual carb~ (Completed 6-7-18)
    '91 300SX

  2. #2
    PWCToday Newbie
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    Re: Js550 crank specs?

    From Clymer manual, to '83 550:
    runout: .003"
    endplay: .029"
    con rod big end clearance: .027"
    con rod radial clearance: .789"
    those are all 'maximum' dimensions.
    your crank should be the same type, non-full circle counter weights with black O-rings on the support bearings.
    Last edited by pepper22; 10-08-2018 at 08:21 PM. Reason: extra info

  3. #3
    PWCToday Regular b00st's Avatar
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    Re: Js550 crank specs?

    Awesome. I'll have to find a Clymer manual, none of the manuals i have had any sort of specs for the crank. Thanks a ton
    '85 JS550/750: ~Small pin/dual carb~ (Completed 6-7-18)
    '91 300SX

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