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Why we call it "inspection"...

Discussion in 'Norton Commando Motorcycles (Classic)' started by concours, Jan 8, 2018.

  1. concours

    concours VIP MEMBER

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    Dec 29, 2011
  2. concours

    concours VIP MEMBER

    Joined:
    Dec 29, 2011
    As for the crank center section, I marked it prior to disassembly. The book mentions reference marks, but I see none.
    My Q is, the drilled balance holes...
    How do I KNOW they are oriented properly? (Toward the front, or rear) I’m thinking they are not arranged all the way to that end of the flat by virtue of casting irregularity..
     
  3. nortonspeed

    nortonspeed Guest

    You don't KNOW if you didn't mark the crankhalve(s) and the flywheel!
     
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  4. comnoz

    comnoz VIP MEMBER

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    Dec 10, 2008
    The only reference marks would be the ones you did before you disassembled it.
     
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  5. concours

    concours VIP MEMBER

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  6. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

    Joined:
    Dec 3, 2012
    Those holes seem to be all over the place, my 850 crankshaft does not have that single hole at the upper part of the centre section and have pictures of other 850 crankshafts that are different again ?

    Even if the crank had no cheek orientation marks for reassembly there will near always be tell tale stain type marks on the mating surfaces of the machined pads that you can match to each other.

    I will suggest the T/S has the casting number on the inner face and the bigger recess to the machined pad (less on the D/S) and the drilled balance holes will also be offset in that direction.

    If it does notwork out I would help you out by paying $100 for that nice looking drive side cheek. :D
     
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  7. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

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    Dec 3, 2012
    I don't know if that picture up the page is before disassembly but you can see the offset I mentioned regarding the balance holes being away from the T/S cheek, the machined pad that the cheek bolts to is also offset (deeper to the counterweight) in the same direction. (as above)
     
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  8. nortonspeed

    nortonspeed Guest

    Best to have the crank/conrods/pistons dynamically balanced anyway. Although you won’t probably notice unbalance (due to the isolastics system) it sure is worth it to give the associated parts easier life.
     
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  9. concours

    concours VIP MEMBER

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    A5012D7B-4B2E-43D1-91EC-BD42DAC47180.jpeg 049FFFA5-497A-42B9-8CAF-36B56A22962B.jpeg CBCB8CDF-F71A-480E-A4C3-B23C8792ED6B.png

    Crank end float measures .015”
     
  10. concours

    concours VIP MEMBER

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    Dec 29, 2011
    8DF64B4C-833D-49C1-BB96-203BD97BAB51.jpeg 94EB3044-A876-4F94-9EB5-0CDFB4434215.jpeg 6F78FBD6-16AD-432E-B0ED-0841AC50AF6A.jpeg DCFCE3F8-57E7-48FA-97F5-A6ABEC1979FA.jpeg 3CC2C540-CA21-463E-8ADA-0B695ECC1FD0.jpeg 33896DD5-1C55-49D9-9842-F6391837FD68.jpeg 377C5272-FDE9-4E18-B944-780B117BB57C.jpeg Now, with two shims, and a coat of sealant, it's .011".
     
  11. CanukNortonNut

    CanukNortonNut

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    Aug 8, 2005
    Last edited: Jan 2, 2019
  12. concours

    concours VIP MEMBER

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    Dec 29, 2011
    Thank you for that. Glad someone is keeping me honest.
     
  13. concours

    concours VIP MEMBER

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    1C0874BE-58AF-48EB-8A75-99FFF9EFC8CE.jpeg C0F05B0E-40E2-4734-9AAB-064912475087.jpeg EDB333AC-E526-4CC8-A1CB-3B3CDFAD56D2.jpeg E427D305-26E5-4B7F-83D3-AB29F72F693E.jpeg That’s been remedied, moving forward.
     
  14. dynodave

    dynodave

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    May 28, 2003
    Nice clean cases. Did you paint them? I believe some guys use a silver BMW paint? Been helping Art H do his MKIII engine...June rally?
     
  15. concours

    concours VIP MEMBER

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    Dec 29, 2011
    I painted (daubed with a rag) the bottom, inaccessible portions. I had used the heated parts wash tank at work which left some etching. I'll do the top portions before building up the top end.
     
  16. concours

    concours VIP MEMBER

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  17. concours

    concours VIP MEMBER

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    Off to my friends aircraft shop to borrow the safety wire...
    A7BEA017-A2A8-4998-A539-A11A5273AA75.jpeg BDB3DC29-B87F-4E91-997C-DC073F2E0B6B.jpeg 87779AEB-1655-43EB-9DAC-C794A27AC447.jpeg
     
  18. Onder

    Onder

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    May 11, 2010
    Owning a brit bike without access to the airport shop....not a easy life!
     
  19. concours

    concours VIP MEMBER

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  20. concours

    concours VIP MEMBER

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