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    1. Kit: , by (Active Member) protarguy is offline
      Builder Last Online: Jul 2018 Show Printable Version Email this Page
      Model Scale: 1/8 Rating:  Thanks: 0
      Started: 07-03-08 Build Revisions: Never  
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      Hi folks,
      a new project: the 1976 Daytona winning BMW R90S !



      BMW wanted to boost their sales by taking some efforts in motorcacle racing.
      They choose the first "Superbike" event at Daytona. 3 bikes were customized for the race.
      Tuner Udo Gietl streched the rules by converting the rear suspension to a monoshock lever.
      The exhaust pipes were emptied of any performance killing interior,
      the engine was moved forward and up to improve handling.
      The front wheel was changed because there were no slick tires available for the stock size.
      The race ended with a foto finish.
      The winner was declared one hour after the end of the race: Steve Mc Laughlin ,
      second was Reg Pridmore also on BMW.
      The third BMW ridden by Gary Fisher did not finish because of engine failure.
      Only one original bike survived. Bruce Armstrong ,a former BMW sales Manager for Butler & Smith
      saved the bike from the backyard of a Bakersfield BMW dealer and restored it to
      it´s former glory.
      It is now in the BMW museum in Munich, Germany.



      By closely watching the above shown photos, you can se some differences in the original bike (b/w photo)
      and the restored bike (colour photo).
      I want to build the model like the the original Daytona winnig machine.

      Since there are no 1/8 scale kits of a BMW R90S , I have to take the necessary parts
      out of several Kits:
      Heller BMW R75/5: wheels, engine
      Heller BMW R 100/S: tank, seat front fairing, frame
      And some scratchbuilding.

      Sor far the project up to now:



      I used a built model of a R100/S and also some built R 75/5 parts purchased via Ebay.

      The air filter housing was removed and some enginme structures had to be scratchbuilt.
      I adjusted the R100S gearbox to the R75/5 engine housing.



      The front engine cover was cut off at the top. So I had to scratchbuild several engine interior parts like the dynamo and diode panel. They will be barely visible on the finished model but far better than a black hole...





      The frame:


      The reflectors at the front fork were removed. The resulting hole was filled with a piece
      of styrene 1/8 BMW R90S #83 Daytona tube. These parts will go towards the inside later.



      The next challenges will be the wheels and the upper fork bridge.
      Stay tuned!

      Uli

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  1. protarguy's Avatar Active Member
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    The shape of things so far:




    The project is developing slowly due to limited time and motivation..
    but also the small fiddly things need much attention and time.



    The front fork mudguard holders. Originally from a BMW R75/5 adapted to the R90S fork.
    The front mudgard will be fixed "the wrong way" like on the prototype
    so that the longer rear end points toward the front
    preventing the wind to go under it and lifting the front wheel.



    The monoshock damper. Scratchbuild from Evergreen rods and disks.
    The spring is still to short and will be replaced.



    The new upper forkbridge. It was constructed from aluminium on the orginal bike to
    get some more ground clearance. The front wheel had to be changed from
    19" to 18" rims because there were no 19" slick racing tires.
    But also the shortened cylinders still scraped the ground in the turns at Daytona..

    Colour will be put on later. Now I have to testfit and dismantle things too often.

    Uli
    Last edited by protarguy; 12-27-10 at 06:18 AM.
    QUOTE QUOTE #17

  2. Don Garrett's Avatar Asst. Administrator
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    Don
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    Well worth the the effort Uli......great replica masterfully executed.
    Grandpa McGurk.....Steppin' Large and Livin' easy.
    TDRinnovations.com
    QUOTE QUOTE #18

  3. protarguy's Avatar Active Member
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    Thank you Don for the kind words.

    uli
    QUOTE QUOTE #19

  4. hot ford coupe's Avatar VIP/Sponsor
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    Jeffrey
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    Is it live or is it memorex? It's getting awfully hard to tell, Uli. It looks more real each time I see it. You're doing a fantastic job on this.
    Sometimes a handful of patience is worth more than a truck load of brains. Have the courage to trust your own beliefs. Don't be swayed by those with louder voices. W.S. Maugham :)
    QUOTE QUOTE #20

  5. protarguy's Avatar Active Member
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    And now in colour!
    Daytona Orange!

    Yet without polishing and clearcoat.
    I simply sprayed good old Revell 1/8 BMW R90S #83 Daytona enamels through my airbrush 1/8 BMW R90S #83 Daytona .
    First silver then orange.



    Still missing are the red pinstripes. I trie to scale down a 1/6 Scale Tamiya 1/8 BMW R90S #83 Daytona
    decal 1/8 BMW R90S #83 Daytona sheet from the BMW R90S and use the stripes.



    Here you can see the colour change between silver and orange.
    The upper part of the fairing will be painted matt black.



    Uli
    Last edited by protarguy; 12-27-10 at 06:19 AM.
    QUOTE QUOTE #21

  6. Ton's Avatar VIP/Sponsor
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    Ton
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    Hi Uli,

    Großer Klasse!

    Could this help for the pinstriping? http://www.letraset.com/design/shopd...Flex+1%2F16%22

    Ton
    QUOTE QUOTE #22

  7. protarguy's Avatar Active Member
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    Hi Ton,
    thank you for the tip.
    The Letraset tape is too wide. We´re talking about 1mm here.
    Uli
    QUOTE QUOTE #23

  8. protarguy's Avatar Active Member
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    The pinstriping is done with ultra-thin self adhesive foil
    from our local script design shop
    The stripes were cut out with two scalpel blades put parallel into a x-acto knife holder.




    Pinstriping also on the seat, front fender and fairing.



    Next step is to cover it with clear cote.

    Uli
    Last edited by protarguy; 12-27-10 at 06:22 AM.
    QUOTE QUOTE #24

  9. Tage's Avatar Yearly Subscriber
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    Daniel
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    Beautiful work Uli...
    Wow.
    QUOTE QUOTE #25

  10. protarguy's Avatar Active Member
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    After long hard work on the computer here are my first selfmade decals for the BMW and Merkel:




    This is only a low-res jpeg of the artwork.
    Converted from various sources and modified with a graphics program.
    Then printed out on white decal 1/8 BMW R90S #83 Daytona film with my inkjet printer.
    When dry they will be covered with clearcote.
    I will use Tamiya 1/8 BMW R90S #83 Daytona Metal Primer 1/8 BMW R90S #83 Daytona from a spray can.
    I bought the can some time ago not knowing the primer 1/8 BMW R90S #83 Daytona is clear.
    But now it is of good use.

    Uli
    Last edited by protarguy; 12-27-10 at 06:25 AM.
    QUOTE QUOTE #26

  11. protarguy's Avatar Active Member
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    Small Update:

    After reprinting the decals- the first set hat some cracks in the 83-numbers it looks like this:





    The struts for the fairing need to be shortened a little. The side number plates are still to wet to apply.
    Uli
    QUOTE QUOTE #27

  12. protarguy's Avatar Active Member
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    On with a part which caused me some headache.
    After some search I stole a set of oil coolers from a 1/12 Tamiya 1/8 BMW R90S #83 Daytona Porsche 934 .



    After some treatment with a saw and file the thing looked like this:



    The detail pieces came from a insanly priced set from Detail Master 1/8 BMW R90S #83 Daytona that I bought some 10 years ago
    to detail my 1/24 Nascar models with braided lines etc.
    The big diameter parts were still in the box just right for this project.
    The Air scoops are 0.3mm aluminium sheet.



    The half finished oil cooler. The hose connections and holding brackets will be added later.



    Uli
    Last edited by protarguy; 12-27-10 at 06:26 AM.
    QUOTE QUOTE #28

  13. Don Garrett's Avatar Asst. Administrator
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    Don
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    Excellent craftsmanship Uli.
    Grandpa McGurk.....Steppin' Large and Livin' easy.
    TDRinnovations.com
    QUOTE QUOTE #29

  14. hot ford coupe's Avatar VIP/Sponsor
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    Jeffrey
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    Sometimes a handful of patience is worth more than a truck load of brains. Have the courage to trust your own beliefs. Don't be swayed by those with louder voices. W.S. Maugham :)
    QUOTE QUOTE #30

  15. protarguy's Avatar Active Member
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    Thanks for looking
    Uli

    QUOTE QUOTE #31

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