The Vintage Trials Thread

Discussion in 'Trials' started by Garthe, Oct 4, 2011.

  1. Pete-NZ

    Pete-NZ Been here awhile

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    :roflThe Red/black ia a bit of a boreing colour
  2. lineaway

    lineaway Long timer

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    I remember actually stripping the paint off my `72 to paint it BLACK. That was january of 1974. :rofl
  3. Twin-shocker

    Twin-shocker Long timer

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    [​IMG]

    I think red/black looks quite nice on older bikes.
  4. PSchrauber

    PSchrauber Been here awhile

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    Looks good, (the bike), sometimes color and the design of parts can either work as an connecting element or a staeg change of style. As design is part of my profession where I earn my money. I highly recommend to replace the rear shock spring or repaint the spring.

    The colored rims doesn't match to the period of the bike, sadly a fashion of the last couple of years.

    The quality of the rear silencer sharp edges don't match to the soft edges of the engine and especially the gas-tank-seat combo, (which fits very nice to the bike).

    Is it yours?
  5. Sting32

    Sting32 Trials Evangelist

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    Nothing about that bike is "period" so why worry about paint?
  6. Twin-shocker

    Twin-shocker Long timer

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    No not mine.........spring colour will be changed soon. Powder coating and polishing tatty original rims costs about 1/10 of the price of new. Exhaust works very well indeed, but certainly would have looked nicer if parts had been pressed.
  7. Twin-shocker

    Twin-shocker Long timer

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    The bike runs and rides better than a 4RT so not its not period...............but to be honest I cant really see why anyone would want to ride a "period" bike in serious competition, when its not that difficult to make older bikes an awful lot better?
  8. PSchrauber

    PSchrauber Been here awhile

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    As the poster of the photo mentioned color I just posted my opinion.
    That is my personal view certainly you can have another opinion. It's the same with favorite meals or colors.

    In a serious twinshock event it's cool to ride a twinshock bike that do have the old look:

    [​IMG]

    [​IMG]

    [​IMG]

    This bike is some decades older here the different components match very good and the design fits to the age of engine and frame, some new parts as the rear shocks, throttle and the bar are mounted.

    It's a 200cc engine, very light and can be used in pre 65 class too.
  9. Twin-shocker

    Twin-shocker Long timer

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    The Zundapp looks quite competitive............I wonder is it an original bike, or something built recently with a period look?
  10. Pete-NZ

    Pete-NZ Been here awhile

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    Has anyone tryed putting fiber fiction plates in a cota clutch...
    To make the steel pack work the clutch springing has to be so
    heavy... If I could fine fibers close enough in size it's not hard to
    re-machine them to fit...

    Dose anyone know if its been done & what plates were used...
  11. Twin-shocker

    Twin-shocker Long timer

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    They make fibre plate conversions for Bultaco, and according to someone who has one they are rubbish. Why not fit a hydraulic conversion of extend the operating arm?
  12. PSchrauber

    PSchrauber Been here awhile

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    To the Montesa clutch problem:

    Hans-Jürg Pfahler (former Importer of Bultaco and Montesa) http://www.bultaco.de/ offers clutch conversion kits,
    for these you have to send him the clutch for machining, (new basket). When I remember right he uses plates from Honda. Anyway this convertion is very good as I have heard from other riders but not cheap and you can't go back to the original set-up.

    To The Zündapp:
    Zündapp never made trials machines for public, the build some works bikes for national riders. In the 50's up to the beginning 70's there where no trialsbikes available for the public. The few bikes standard trials bikes that where ridden then where bought in foreign countrys or self imported, therefore many custom made bikes exist.

    The Zündapp trials machines where build from the 200 and 250cc street bikes, so each bike do look different.

    The engine and the frame is original, the tank is original too but modiefied, (made smaller), also the frame was rebuild, note the missing loop under the engine up to the steering steam which was a feature of Zündapp bikes in the late 50's. Any other parts are certainly custom made if they where done back then or just a couple of years ago is not visible. The point is that if they where made "today" they where made like they did 40 years and more ago. So the look and the characteristics are pretty much the same.

    As already mentioned I like contemporary bikes where the main components (engine and frame) and the fittings, (fenders, wheels, ...) match there is backdraw when all components mate in the overall view.
  13. Brewtus

    Brewtus Buffoonery, Inc.

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    Well I for one think this thing is damn pretty. If it ever found it's way to the Wild, Wild West, I'd be honored to steal it and take on Lineaway in NMTA's Twinshock class. Probably to the same result, but I'd look DAMN good doing so.... :evil
  14. Pete-NZ

    Pete-NZ Been here awhile

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    Yes I have read about there conversion...
    Sending my clutch half way around the world to get them to do what I can do myself is
    not really a option..
    Just need to find some plates that fit or are close enough to machine to fit...
    Guess I will have to go anoy the guys at the bike shops... See what I can
    come up with...
  15. AteamNM

    AteamNM Wonna Be ADVrider

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    Lineaway is riding the vintage event this weekend in Howard Colorado. Go Bob go. :freaky
  16. Twin-shocker

    Twin-shocker Long timer

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    Never had a single problem with the all metal clutch on any of the Monts I owned back in the day, and its worth bearing in mind that the stock parts work, before fitting a conversion which very likely wont.

    Diameter of the clutch on old Spanish bikes is very small, so I would guess that changing friction plate material and reducing spring pressure may well mean problems with slippage.
  17. Pete-NZ

    Pete-NZ Been here awhile

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    Its no drama if it dosn't work .. i will go back to the all steel stack..
    I have a mod in mind that requires fiber plates...
  18. Twin-shocker

    Twin-shocker Long timer

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    Before doing anything, have a close look at whether or not its feasible to increase clutch release mechanism travel, as you will probably find you will need more travel as conventional friction plates expand when hot, and steel ones dont.

    Personally I would have looked and altering the stock chopper steering angle, and adding a bit of length to the swinging arm on a 348, before getting involved with very fiddly engineering work to alter the clutch.
  19. PSchrauber

    PSchrauber Been here awhile

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    If you have the experience why did you ask?

    I had send the flywheel of my KTM to Chuck Stealy in Medford Oregon (US) for adding some weight. From my location this is too half way around the earth. Beside the shipping duration and the shipping costs :/,
    it worked out very well.

    [​IMG]

    I tried to find someone here in Germany, but couldn't find anyone, the offers I got with an affordable price where without balancing out the rotor or where riddiculous expensive.

    I have read somewhere - forgot where, (may be TC?) - that plates of the CB 125 should fit. But in my experience so far a replacement of the basket with better working plates and a modiefied pressure plate that fit's to the montesa engine is the best way to do it. Sure you can try out but if it don't work you will have to pay the double amount in effort, time and money ...
  20. Twin-shocker

    Twin-shocker Long timer

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    Thats strange...............looks a very simple job for anyone with a largish lathe, and some brass or bronze bar stock?