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  • What colour?

    On my 1966 Challenger what colour would the number plates be?
    I know in 1970 I had white numbers on green background on my grasser, but not sure of the ACU regs for the colours in 1966.

    Cheers
    Colin

  • #2
    ACU number plates.

    Found this on another forum, should answer your query.

    1. Numbers must be clearly visible to the public and officials. All other number plates
    or markings on a motorcycle liable to cause confusion with the number must be
    removed before the start of a competition.

    2. One machine number must be displayed on the front of the motorcycle inclined
    not more than 30 degrees rearwards from the vertical. Holes can be perforated
    between the numbers on a front number plate. The actual numbers must not be
    perforated.

    3. Side numbers may be displayed on the sides of the fairing or the rear seat unit.

    4. If numbers are displayed on separate plates, they must be rectangular shape and
    made from a rigid and solid material with minimum measurements 285mm by
    235mm. The plates should not be curved or bent more than 50mm out of the flat
    plane.

    5 The figures must be clearly legible and like the background must be painted in matt
    colours as described below to avoid reflection in sunlight.

    6 The minimum dimensions of front numbers are:
    Background 285 mm by 235 mm
    Height of figure 140mm
    Width of figure 80mm
    Width of stroke 25mm
    Space between two figures 15mm

    7 The minimum dimensions of side numbers are:
    Background 260 mm by 220 mm
    Height of figure 120mm
    Width of stroke 25mm
    Space between 2 figures 15mm
    Width of figure 70mm

    8. A space of at least 5cm must be left free around all number plates in which
    no advertising may appear.

    9. Figures must conform to the Number Plates diagram within this Handbook.

    10. The colours for background and figures vary according to the class of
    motorcycle and type of competition. The following colours shall be used and
    they must have a matt finish and comply with the RAL colour table:
    Black 9005, Blue 5010, Yellow 1003, Orange 2007,
    Red 3020, Green 6002, White 9010,
    The front and side number plates for each class of motorcycles are:
    Class Background Numbers

    F125cc Red background White numbers
    125cc Black background White numbers
    250cc Green background White numbers
    350cc Blue background White numbers
    500cc Yellow background Black numbers
    Over 500cc White background Black numbers
    Formula 400 Blue background White numbers
    Supersport 600 White background Blue numbers
    Formula 600 White background Blue numbers
    Supermono Black background Yellow numbers
    Stocksport Red background White numbers
    FII Sidecars Red background White numbers
    Open Sidecars White background Black numbers (incl three wheelers)

    Comment


    • #3
      White on green colin, white on red over 250, forget all the mm measurements, the scruteneers are more than happy with clear figures on standard race plates.
      See if you had gone for a bike of pre 65 vintage, you could have used the much sought after white on black.... dave.

      Comment


      • #4
        Thanks for the info John,
        Never thought so many regulations were needed for a simple number plate

        Cheers
        Colin

        Comment


        • #5
          Thanks Dave, for the info.
          Seems I missed the White on Black by just a year. Just like me always late
          So White on Green it is, will match the frame I reckon

          Cheers
          Colin

          Comment


          • #6
            Non bike story, but shows stupid can happen.....My pal entered a car rally where the regs stated all cars must use BLACK numbers, so that's what he did. Showed up well on a BLACK Ford Escort.....No mention of background colours!

            Comment


            • #7
              Race Numbers

              Hi There,

              If you are racing under the amca as the pre65 club do your bike is eligible in the pre65 class as your bike is an alloy beamed frame Greeves upto 250cc, I know this because I ride my 1968 short stroke 250 MX4 challenger in the pre65 class.

              So I would put white numbers on black background if you intend on using the bike

              Regards

              Scott 151 (white on black)

              Comment


              • #8
                Thanks for that Scott 151,

                I should have pointed out that in all probabilty my MX3 will not be raced as I don't think the gearbox would stand up to it and most definately I know I wouldn't.
                As I have the option I just thought I would get the period detail correct.

                Cheers
                Colin

                Comment


                • #9
                  Originally posted by cray View Post
                  On my 1966 Challenger what colour would the number plates be?
                  I know in 1970 I had white numbers on green background on my grasser, but not sure of the ACU regs for the colours in 1966.

                  Cheers
                  Colin
                  Would a 1958 250cc scrambler have a green background competition plate?

                  Comment


                  • #10
                    A colour photo of Brian Stonebridge riding the 250cc NSU Greeves in a domestic scramble at Brands on 5th April 1959 shows white numbers on black plates - if that's any help.

                    The same bike in international events had black numbers on white plates...
                    Last edited by Colin Sparrow; 19/04/2017, 11:16 AM.
                    Colin Sparrow

                    Comment


                    • #11
                      Originally posted by Colin Sparrow View Post
                      A colour photo of Brian Stonebridge riding the 250cc NSU Greeves in a domestic scramble at Brands on 5th April 1959 shows white numbers on black plates - if that's any help.

                      The same bike in international events had black numbers on white plates...
                      Thanks Colin,now I,m even more confused !!!!

                      Comment

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