748 Mystery Part Time Again

Discussion in '748 / 916 / 996 / 998' started by West Cork Paul, Sep 13, 2019 at 10:52 AM.

  1. Having taken my '99 748 completely apart to treat various bits of surface corrosion and replace almost all the nuts & bolts and now having finished putting it back together again I find I have a bit left over. A circlip, although a very heavy duty circlip. However, I cannot for the life of me find out where it's come from:confused:

    It was in the bucket of bits from disassembling and removing the rear wheel, rear sprocket and rear wheel pin, so, as I'm quite careful about keeping the bits labelled and separate as it came apart I'm assuming it came from there.

    I have, over the past 2 weeks, disassembled and reassembled the entire rear wheel assembly 3 times now. Each time I have carefully examined everything and compared it with the parts diagrams. The circlips that should be in-situ to retain the bearing within the swing arm and part 18 on the attached diagram are in place. (NB. I never disassembled the swing arm bearing, it was all good in there so I just greased it).

    Anyone, any ideas where it might be from please :thinkingface:

    IMG_1505.jpg IMG_1506.jpg IMG_1503.jpg Screen Shot 2019-09-13 at 10.48.16.png IMG_1504.jpg
     
  2. You shouldn't use copper grease near bearings, it wears them out.
     
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  3. May be the case yours has the earlier hub and the clip could be number 11 in this diagram?

    748 hub.png
     
  4. Although no 11 looks like an internal clip and Paul's looks like an external clip.
     
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  5. Look at the second image of the clip, it is internal. In the first image the calipers confuse the image making it look external!
     
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  6. Still looks like an external clip to me.
     
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  7. @West Cork Paul Haven't you learned from the sprocket thread stay well away from bike mechanics.:p
     
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  8. The clip in question is an outside clip. The clip in the drawing does look like an internal, but it clips over the sprocket carrier boss. Maybe a generic drawing error? It's 11 years old.... they would have been using windows 3.1 LOL
     
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  9. Just throw it in the bin and put it down to lightening the bike.
    If it was important you will find out sooner or later lol
     
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  10. Apart from circlip 18 all the other ones in that drawing look like internal, so that's most probably the case.
     
  11. Paul, just give up - the name change is fooling no one :p
     
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  12. One less thing to seize up as well o_O
     
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  13. Malevolent pixies use their evil magic to exchange socks stolen at midnight with small metal objects and leave them in random places round garages. Fact.
     
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  14. Sorry, haven't read the thread.

    You really had no idea how and why you've gone part time? There must be an explanation.
     
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  15. Useful, thanks. Contradicts another instruction but I’m inclined to side with you.
    Very useful. I did remove & replace the original rear sprocket/carrier with a JRT carrier and QR sprocket so it did occur to me it came from that. I will check again (I’m a dab hand at stripping down and rebuilding the rear assembly now) there is no need of such a circlip in the new carrier.

    LOL, it had occurred to me that when I road test it, I’ll be braking for a corner, there’ll be a crunch from the back and the rear wheel will overtake me and enter the bend first. :confused:
     
    #15 West Cork Paul, Sep 13, 2019 at 11:07 PM
    Last edited: Sep 14, 2019 at 9:32 AM
  16. A change of life Loz, we only live once. Anyway, I enjoy life now, even if sprockets try to upset that.
     
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  17. There’s only one way to learn :D
     
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  18. At least you'll be able to see what line it takes through the bend..
     
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  19. Like in on the buses when olive in the sidecar overtakes Arthur lol comedy gold
     
  20. Try try try again.:upyeah: