749 749r Suspension Rod Length

Discussion in '749 / 999' started by RickyX, Jun 13, 2018.

  1. Hello,

    I have been told that the suspension rod on the 749R is different to other 749/999 models due to the “flat rate” rocker arm.

    I just measured my R one and it measures 168mm (just the actual rod, not including nuts and rod ends).

    Could some kind soul kindly measure their standard rod (just the rod, not including nuts and rod ends) and let me know the length please?

    @Cream_Revenge ? Fancy a trip into your garage to look at your lovely 999?.

    Cheers,
    R
     
  2. My prototype has a fixed one piece of 198mm if that helps o_O
    My 999R is 208mm :thinkingface: I didn't have to go to my garage :yum
    Best I can measure with a tape measure (disclaimer).
     
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  3. Ooh Stu, I forgot you had a shed/house load of bikes close to hand!

    Thanks!!
     
  4. That’s 40mm difference in length...20mm each end...
    I wonder if the internal threads are deep enough to allow me to slice 20mm off each end of a standard (that’s a 999R one!) one??

    OEM P/No for 749R is 875.1.099.1A but none available on that there ebay...
     
  5. @Sev Shock is different as well - shorter stroke, stiffer spring.
     
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  6. the rocker is different as well...more linear..
     
  7. @RickyX you still need me to do something?
     
  8. 749r rocker (left) versus 999r rocker

    rebuild3 004.jpg
     
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  9. 749R rod (top) versus 999r rod
    rebuild3 005.jpg
     
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  10. Not used on any other bike either on checking the part files...
     
  11. what length do you want to achieve eye to eye on the rod?
     
  12. Ive got this..goes from 130 up to 160 eye to eye.

    IMG_0564.PNG
     
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  13. Just looked on my data sheet - length between rod end centres is 243mm.
    (Note that it has been at this length for 8 years and is perfect for me.)
     
  14. Cheers, I think I’m sorted for the measuring job now! Ta.
     
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  15. no
     
  16. Yes.. pm me an email address and ill send you what i have...

    Screen Shot 2018-06-14 at 07.57.36.png
     
  17. Got my “standard” 749/999(R) rod off @Nelson (ta!) today and immediately went tinkering in the garage.
    I reckon that I can cut it down a bit and still maintain the 243mm centres distance I have been using on my 749R.
    The threads are deep enough to ensure at least the same engagement as I have had with the R rod since with my 243mm centre length the rod ends protrude quite a lot with the short R rod.

    Time to come clean: I replaced the rod ends on my bike last week as they were getting a bit scuzzy. I replaced them with some from McGill Motorsport however the wait for the standard L/H thread Ducati alloy locknut was about 6 months.
    I ordered some steel locknuts from McGill (5 quid for 5). Unfortunately....I may have nipped one up a bit much and think I may have cracked the R rod! There is a teeny longitudinal mark about 2mm long at the edge of the rod on the outside. I cleaned it up with a fine file and emery and it disappeared. It was probably there all along but for peace of mind, I thought I’d rather replace the rod rather than have my suspension collapse on track.
    I will get the R rod NDT inspected at work to check sometime but in the meantime I will use the “cooking” standard rod.
     
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