765 Swinging Arm Swap.

Discussion in 'Technical Help' started by Uncorrugated, Aug 19, 2019.

  1. Uncorrugated

    Uncorrugated Senior Member

    May 25, 2017
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    #1 Uncorrugated, Aug 19, 2019
    Odd question, I know.

    I am trying to find out if the swinging arm from a Daytona or S3 675 will fit directly into the swingarm mounts on the 765.

    As some of you know I currently drag race my 765RS and over the winter I will be fitting an extended swingarm to help keep the front on the ground and get a better launch without the front wheel heading skywards. The shape of the earlier 675 arm will be easier to extend than the 765, and I will be extending a replacement so that I can swap back as and when needed.

    Thanks.

    OOO_1940copy.jpg
     
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  2. Eldon

    Eldon Elite Member

    Nov 14, 2018
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    #2 Eldon, Sep 24, 2019
    Nice picture, good timing, was it taken from a video?

    Not sure many will have had their 765 swingarm out so can't see there being a lot of info about.
    Might have to be a suck it and see job but a nice little project for someone ;)
     
  3. billyandmollysdad

    billyandmollysdad Senior Member

    Jun 10, 2014
    361
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    Just outside Newmarket in Cambridgeshire
    #3 billyandmollysdad, Sep 24, 2019
    I suppose you've already looked into this, but is there nobody manufacturing bolt on extensions for your model ?
    I was always a bit sceptical about these, but eventually gave in and bought some for my GSXR1000, and used them with absolutely no issues whatsoever.
    Hope you find what you're looking for mate.

    Daves bike2.jpg
     
  4. Eldon

    Eldon Elite Member

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    #4 Eldon, Sep 24, 2019
    With those bars and motor that would make an ideal wheelie machine :p obviously on the standard arm.
    Rode a K5 with Renthals and that was fun.
     
  5. Uncorrugated

    Uncorrugated Senior Member

    May 25, 2017
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    #5 Uncorrugated, Sep 24, 2019
    The photo is a still taken by Ian Blackett of Blackett Photography. Ian is at every event at the Pod and has has a knack of being in the right place at the right time. Ian also took the photo in my avatar.

    As for the swinging arm, there are a couple of options, find a cheap 675 arm and see if it will fit at the bearing end before modding it, or use a 765 one and hope that the 675 extenders that are available will fit it.
    Either way, it would have helped if anyone knew if the two were interchangable first.

    I'll keep you updated.
     
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  6. Uncorrugated

    Uncorrugated Senior Member

    May 25, 2017
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    #6 Uncorrugated, Sep 24, 2019
    There is a Polish firm that specialises in stunt and drifting options that does a set for the 675, which we think will also fit the 765 arm. Not too expensive either. They will be welded in rather than bolted and my preference is to use a 675 arm as I prefer the shape (there are more around and significantly cheaper than the 765 arm at present) and I want to keep the original so that I can revert to the standard as and when.
     
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  7. billyandmollysdad

    billyandmollysdad Senior Member

    Jun 10, 2014
    361
    113
    Just outside Newmarket in Cambridgeshire
    #7 billyandmollysdad, Sep 24, 2019
    Yeah, it was !
    I was never that good at wheelies to make the most of it though, i was ok on supermoto's, but not at the speeds a litre sportsbike will do...
     
  8. billyandmollysdad

    billyandmollysdad Senior Member

    Jun 10, 2014
    361
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    Just outside Newmarket in Cambridgeshire
    #8 billyandmollysdad, Sep 24, 2019
    get it done then mate !
    i love a stretched arm
     
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  9. Eldon

    Eldon Elite Member

    Nov 14, 2018
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    #9 Eldon, Sep 24, 2019
    The back brake is your friend and the answer, the big problem is how do you get practice without the inevitable tumbles :confused:
     
  10. Eldon

    Eldon Elite Member

    Nov 14, 2018
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    #10 Eldon, Sep 24, 2019
    Should be a straightforward TIG job and preferable in my opinion, for what it's worth, than bolting.
    Once welded a friends swingarm after a sprocket nut came undone and turned the wheel into a milling cutter :eek: a nice lovely curved slot about 8mm deep on the inside :worried:
     
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  11. feckless

    feckless Noble Member

    Apr 16, 2019
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    #11 feckless, Sep 25, 2019
    One careful owner, never been raced bur has been dragged around a bit :D:D:D
     
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  12. feckless

    feckless Noble Member

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    #12 feckless, Sep 25, 2019
    Last edited: Sep 25, 2019
    One careful owner, never been raced but has been dragged around a bit :D:D:D
     
  13. Eldon

    Eldon Elite Member

    Nov 14, 2018
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    #13 Eldon, Sep 25, 2019
    Low mileage :worried:
    1/4 miles only add up slowly :rolleyes: a day out will be all of what, 3 miles? :joy:
     
  14. Uncorrugated

    Uncorrugated Senior Member

    May 25, 2017
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    #14 Uncorrugated, Sep 25, 2019
    It really has had one careful owner. Properly run in and pampered.




    ...then I bought it. ;):imp:
     
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  15. Old phart phred

    Old phart phred Noble Member

    Jun 23, 2019
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    #15 Old phart phred, Sep 26, 2019
    Wheelies are caused by wheel torque and the associated weight transfer. Heavy and mass up high makes this worse. Weight transfer is good for rear tire traction so you have to find the compromise. Just food for thought, rotate your handlebars forward about 30 degrees or maybe more, foward, it brings your upper torso weight forward and down which will reduces the wheelie effect. Gives you a better tuck position also. If you have an all position agm lead acid battery you may want move it forward and as low as possible next to the exhaust in the chin spoiler with an appropriate heat shield.
     
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  16. Yorkshireman

    Yorkshireman Crème de la Crème

    Dec 12, 2015
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    #16 Yorkshireman, Sep 26, 2019
    Just get one of those MotoGP launch devices that lock the rear suspension, can’t be that expensive can they?:D
     
  17. Uncorrugated

    Uncorrugated Senior Member

    May 25, 2017
    543
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    Northamptonshire
    #17 Uncorrugated, Sep 30, 2019
    No problem with traction at all, bars are already rotated forward and front strapped. Still can't use much more than 1/2 throttle through first without pulling the wheel up.
    Too long an extension to the swinging arm can reduce traction, but I'm not making enough power for that to be a significant issue at the moment.
    Plans are in place for the off season and we'll see how they work out in pre-season testing.
     
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