RATEL engineering design - BMW 650GS/Dakar/Sertao YZ/WR suspension upgrade

Discussion in 'Vendors' started by Aquatic, Feb 3, 2014.

  1. Aquatic

    Aquatic Long timer

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  2. GrizzLee

    GrizzLee RubiKon Adventures

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    Craig,

    Maybe you could include a paint can and a stuffed Kangaroo with your orders.
    :hide
  3. Aquatic

    Aquatic Long timer

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    I have in the past sent Kangaroo Scrotum money pouches as gifts
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  4. Burner25

    Burner25 Been here awhile

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    Hi
    I’ve , read through this thread, and it does go back a few years so I’ve a quick question.

    I’ve a set of wr 426 forks which I will be setting up in the summer. I’ve been offered a Yamaha excel rim , which are much easier to source than making up an excel bmw rim!
    I know the smaller braking system was a point of debate, so a few years on . Has anyone just used the yz/wr excell wheel and with what results?
    Did the ABS , bracket issue get sorted?

    If you can just drop a yam’ front end on , connnect the brakes and off you go , that’s a lot less messing about!
    And I mile cheaper!
    Like I say it’s a spring/ summer project, so I’m just asking,
    Thanks
  5. Aquatic

    Aquatic Long timer

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    It is possible to modify the BMW disc to fit the Yamaha hub.
    Use a Ratel Caliper Hanger, BMW brakes and off you go.

    The argument against this is that you will need to modify the disc every time you replace it
  6. Burner25

    Burner25 Been here awhile

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    Thanks for the reply
    How do you modify the disk? What needs doing?
    Thanks
  7. Aquatic

    Aquatic Long timer

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    You will need to machine the Internal diameter of the disc and ad 6 new screw holes.
  8. Burner25

    Burner25 Been here awhile

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    Is that so it fits the wr hub then?, so I’ll have to get a yz wheel and get the measurements for internal diameter and holes position!
    Thanks Craig
  9. Aquatic

    Aquatic Long timer

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    Exactly!

    You will need to use countersink head screws or button head screws.
    Std capscrews or bolts will not work
  10. Burner25

    Burner25 Been here awhile

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    Hi
    This is probably a idiot question but....
    I’ve been offered a yz front wheel, does it matter what CC 250/450, it comes off are they made the same strength?this is excel!
    So I’ll have a set of WR426 forks, yz front wheel!
    Going to get a bmw disk and adapt it as above,( thanks Craig).
    So I’ll just need

    Ratel
    Calliper bracket
    8mm neck spacer
    Horn and fender bracket
    Brake line
    Abs spacer/ bracket?

    Is that all I need to do the conversation?

    Many thanks!!
  11. Aquatic

    Aquatic Long timer

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    Hey Burner
    I can help you but.....

    Keeping the ABS will be an issue
    The ABS ring doesn't fit the Yamaha hub,
    however, I do have a design for a ring that will fit(the fingers are longer), but.....
    This is and unproven system and I'm not sure if the old style ABS brackets(I have 1 left) will work.
    My current ABS bracket is not an option.

    Also getting a custom ABS ring made will incur a minimum cost. About $80.

    Please give me a little time to see if I can get this to work.

    Please follow up in 2 weeks - craigkrantz@ratel.com.au
  12. BGumm

    BGumm n00b

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    Looks like Burner25 and I have the same plan over the winter. I have a 2001 Dakar I am planning on doing the swap. I was hoping the save the front week and brake/caliper and put those on a YZ front end. Aquatic, sounds like I would need your front kit, with axle, spacer etc. Also the bracket to modify the caliper placement for the BMW brake. Is that all? Do you have current stock of your products?

    Burner25, we should stay in touch on the progress of our projects.

    Thanks for the help, yall.
  13. Burner25

    Burner25 Been here awhile

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    Yes sounds good !

    I have a set of forks ,WR from a 2001, i was also going to get a 2013 yz 250 excel front wheel, but I’m not sure if it’s compatible yet?. But aquatic said it’s a bit fiddly regarding the abs and getting the bmw disk changed to fit the yz wheel. ( but it would be less expensive!)so I’m not sure if I’m just going with the axle kit, and caliper!
    I’ve bought a old set of top yokes and cut off the ignition bracket so it can be welded on the new set up!
    That’s as far as I’ve gotten so far!!

    I did fit a set of touratech progressive springs and race tech valves to the bike to see how it was , and it’s much better, but I’ve not tried it off road yet. I am on a ride tomorrow, so it might get tested then!!!
  14. Aquatic

    Aquatic Long timer

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    Please email me - craigkrantz@ratel.com.au
  15. Aquatic

    Aquatic Long timer

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    Next project

    KYB SSS closed cartridge forks conversion kit.
    Starting with @Adsun 's Husky Terra
    20200131_110043.jpg
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  16. Aquatic

    Aquatic Long timer

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    Forks stripped off
    Rear suspension knuckle removed

    20200131_135801.jpg

    Neck bearings were absolutely fucked!!!
    20200131_130857.jpg

    A bunch of measuring, design and machining to do.

    All the conversion parts need to be redesigned
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  17. shortman

    shortman Beta 500 RS, X-Trainer 250 Supporter

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    Will be very interested to see what bearings you choose to put back in there... Mine need to be changed now...
  18. Aquatic

    Aquatic Long timer

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    Boring out the lower clamp to take the new forks
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  19. Gravel Seeker

    Gravel Seeker Old, growing older.

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  20. Aquatic

    Aquatic Long timer

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    And now?
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