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Bearings big ends

Discussion in 'Yamaha 250cc In-Line 4's' started by Carel040, May 14, 2014.

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  1. Carel040

    Carel040 Active Member Premium Member

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    Pls need advice

    Just picked up crank can't wait to start assembling the motor

    Can anyone plz Advise me on bearing selection on color code on it the engineering shop said the journal sizes is 26.99

    No ink stamp on conrods

    Sent from my C1905
     
    Last edited by a moderator: May 14, 2014
    Carel040, May 14, 2014
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  2. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    Murdo, May 14, 2014
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  3. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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  4. Carel040

    Carel040 Active Member Premium Member

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    Hey guys need some help plzzzzzz the crank is still std cant seem to find any color on shells of old bearings the last four no on crank web is 2222 and 554444 on casings , as far as my knowledge is the fzr400 is basically the same except for bore and stroke the crank bigend journals measure 26.997 plz can anyone help

    Regards Carel

    Sent from my C1905
     
    Carel040, May 16, 2014
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  5. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    What does the manual say about the sizes and clearances?
     
    Murdo, May 16, 2014
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  6. Carel040

    Carel040 Active Member Premium Member

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    Hey Murdo as far as I know between. 048 and.060 as in manual of fzr 400


    Don't have anything on the fizzer

    Sent from my C1905
     
    Carel040, May 17, 2014
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  7. Carel040

    Carel040 Active Member Premium Member

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    [​IMG]

    Sent from my C1905
     
    Carel040, May 17, 2014
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  8. Carel040

    Carel040 Active Member Premium Member

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    Sent from my C1905
     
    Carel040, May 17, 2014
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  9. Carel040

    Carel040 Active Member Premium Member

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    Hey Murdo as u can see no ink no on conrods


    Hey Grey can u see her now she looks a bit tatty

    Sent from my C1905
     
    Last edited by a moderator: May 17, 2014
    Carel040, May 17, 2014
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  10. Carel040

    Carel040 Active Member Premium Member

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    Sent from my C1905
     
    Carel040, May 17, 2014
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  11. Carel040

    Carel040 Active Member Premium Member

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    Frustrated

    Sent from my C1905
     
    Carel040, May 17, 2014
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  12. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Just at a glance the bearing shell selection may have numbers for the journal diameter and conrod bore diameter - that's all you're tying to work out

    If the different shells come with the material thickness listed also - then measure the conrod bore diameter minus twice the shell material thickness which should yield the appropriate big end journal diameter

    If the parts details don't give the material thickness then what I've just described is useless

    peace out
     
    ruckusman, May 17, 2014
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  13. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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  14. Carel040

    Carel040 Active Member Premium Member

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    Found this on the net [​IMG]

    Sent from my C1905
     
    Carel040, May 17, 2014
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  15. Carel040

    Carel040 Active Member Premium Member

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    Sent from my C1905
     
    Carel040, May 17, 2014
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  16. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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  17. Carel040

    Carel040 Active Member Premium Member

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    Hey Grey can't get into the link that u have sent me my password doesn't match even tryed my Facebook password

    Sent from my C1905
     
    Carel040, May 18, 2014
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  18. kiffsta

    kiffsta Senior Member

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    Hey Carel

    Click on the Resources button (on the top of the page), once it loads, then look for the heading Categories on the left hand side, then click on Yamaha then FZR250

    Chris
     
    kiffsta, May 18, 2014
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  19. RosscoM

    RosscoM Active Member Premium Member

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    check out this item no. on ebay 251524660573 it says conrod bearings but they are crank main bearings... buying yamaha will cost a fortune if they are still available, if yours is a 400 I think they do those also... the only time you would use color coded bearings is if you are planning on racing and you want absolute precision clearances, otherwise a standard aftermarket set will do.
     
    • Like Like x 1
    RosscoM, May 24, 2014
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  20. risky

    risky risky

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    risky, May 24, 2014
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