Africa Twin CRF1000L suspension

Discussion in 'Japanese polycylindered adventure bikes' started by uk_mouse, Jun 22, 2016.

  1. Motociclo

    Motociclo Been here awhile Supporter

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    Nice forks. They're not immune either.
    @Greg the pole can give you some info.
  2. madafakinges

    madafakinges CrfL

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    70514866_388700355355767_3507543831790747648_n.jpg
    I bought 2009 yzf450 kyb sss fork for 150$:D
    I did some measurement.

    Total leght from top to axel is

    KYB 935mm travel 310mm
    ATAS fork 910 travel 250mm

    Uper tube

    KYB 575
    ATAS 560

    Foot
    KYB 50
    ATAS 100

    KYB 935- 100(sag) =835
    ATAS 910- 80(sag)= 830

    So if i make KYB less tarvel it become shorter than ATAS...
    280mm
    905- 90(sag)= 815...
    If i want leave geometry od bike i have to leave 310
    But 310 on front and only 240 on back... It will be ok?

    There is mupo shock with 260mm of travel but its still 50mm of diference....

    Another think, AT foot is 5cm longer than KYB and uper tube is only 1,5cm shorter. So when fork will bottomed wheel will be 3,5cm closer to frame, i hope it will not hit the frame...
    flyin_ likes this.
  3. madafakinges

    madafakinges CrfL

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    I already find some answers
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  4. Junglejeff1

    Junglejeff1 Long timer

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    You will need to switch to a master cylinder with smaller piston for single disc.With stock master will be like pulling on a chunk of wood.
  5. madafakinges

    madafakinges CrfL

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    I already use simgle disc with cb500x master cylinder,but i dont like them, i will find brembo from ktm 690 smc, or similar.


    I spoke with my suspension guy, he said we can make shorter travel and leave the same lenght or any difrent. At first i will do swap, shims, and breake adapter then send ti to him to proper setting.
    Im thinkin about 260-270mm of travel:D
    Junglejeff1 likes this.
  6. MillennialFalcon

    MillennialFalcon Improvement starts with self

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    What would it take to get 310 mm in the back? Custom shock? If you follow the T7 thread, I'm one of those "completely insane" guys who wants MX suspension on these bikes so that I can, you know, do what they do in the marketing campaigns instead of settling for the Starbucks reality most these boomers are buying these bikes for.
    Lost Cartographer likes this.
  7. 97707

    97707 Go Long

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    If you document everything you do to make this conversion work, it will be valuable information to those who follow your example.

    .
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  8. madafakinges

    madafakinges CrfL

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    I think itsn not posible, rear linkage will not take much longer shock than ATAS one. I think 260 is max you can use on back.
    http://www.mupo.it/product/2/0/266/cr-1
    270mm on front 260 on back it will be more than enought:jkam
  9. Greg the pole

    Greg the pole There are no stupid questions, only stupid people

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    Nice pics.
    Yes the ohs are stiffer. Not the perfect fork when used hard. I'm over 10k km now with the ohs. Will do a winter tear down and update on internal going ons
    97707 likes this.
  10. Lost Cartographer

    Lost Cartographer Been here awhile

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    Does anyone have the eye-to-eye length of the ATAS rear shock?

    Thanks.
  11. Motociclo

    Motociclo Been here awhile Supporter

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    402mm
    Lost Cartographer likes this.
  12. madafakinges

    madafakinges CrfL

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    IMG_20190915_152741.jpg
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  13. madafakinges

    madafakinges CrfL

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    Its look completly the same, ATAS have 7mm longer storke and longer spring, thats all.
    395mm vs. 402mm
    Lost Cartographer likes this.
  14. Merlin44

    Merlin44 XR400R & Africa Twin Supporter

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    Something I never noticed before while riding.
    Week long trip last week. Had a little off-road, lot of highway, in West Texas.
    While on the highway, about 75 mph, I noticed the upper and lower triples were not aligned with each other. Figured I'd loosen everything and retighten at the end of the day.
    When I stopped, there wasn't any misalignment.
    I had already changed the springs for Cogent. And used the reduced torque on the lower clamps.
    Can't imagine this twisting is good for the tubes.
    Had not heard anyone say anything about this until just a few posts back.
    Anything to do to keep this from happening besides better forks?
  15. Greg the pole

    Greg the pole There are no stupid questions, only stupid people

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  16. Merlin44

    Merlin44 XR400R & Africa Twin Supporter

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    Thanks. Greg. I've read that one, too. I also used the SKF seals when I changed oil and put in the Cogent springs. Didn't revalve. Maybe next time. Just rotated stock tubes and took it on a week long trip. Wasn't bad. Still adjusting. Your videos were extremely helpful. Thanks for that.
  17. Greg the pole

    Greg the pole There are no stupid questions, only stupid people

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    glad to hear it. I'm not sure if rotating the tubes will make it worse, as now the bushing will have more worn coating to get over..who knows.
  18. Motociclo

    Motociclo Been here awhile Supporter

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    Have been spending time, too much time looking at 2020 AT forks.
    From what I can see, they are the same forks as the current ATAS.
    I am chasing up part numbers. Hopefully have something soon.
    I seriously doubt that they would be anything different than what I mentioned. Naturally many of the ES models internals will be different.
  19. Amphib

    Amphib A mind is like a parachute....

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    Thanks man. I have decided to hold off on my upgrade till this is all known.
  20. Greg the pole

    Greg the pole There are no stupid questions, only stupid people

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    yeah..but the 2020 has apple car play, so you can distract yourself by watching pornography while riding...:flush
    Motociclo likes this.