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Thread: Has anyone made a lightweight frame

  1. #1
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    Has anyone made a lightweight frame

    Hello, quick intro - just bought a derbi 50 replica which I intend to race ,
    The current weight is 109 kg - ideally Id like to halve that ,
    have a friend who races one and has transplanted engine into a Honda rs125,
    Click image for larger version. 

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  2. #2
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    Carbon fairings, lighter wheels, 415 chain, lighter screws(magnesium or aluminium), light exhaust. Just a few ideas.

  3. #3
    apriliaforum expert mattology's Avatar
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    some guys in germany made a carbon frame

    Get your confidence back with Aprilia.

    caution: the use of motorcycles may be habit forming. side effects include purchasing multiple examples of the same bike, in different states of tune, different years, or different models altogether. some motorcycles may be not running when purchased. some parts are no longer available. there are rare instances where aprilias are bought over the internet and upon arrival, they are not as were originally disclosed. there is a small group of people who cannot handle two stroke engines and motorcycle maintenance. if this is the case, you may not be a candidate for Aprilia RS250's.

    Aprilia. Ask your doctor if the RS250 is right for you.

  4. #4
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    Well after having a week to think about it have decided to build a tube frame for it - maybe a swingarm if the frame works out ok ,
    have purchased some shorter forks to match my other frame I intend to copy,
    will be using my wet rims (Honda rs125) from other bike to get project running then see what happens after that ,
    not concerned with engine output at the moment - but will dyno it before I start doing any modifications,
    motor will stay 50cc as that the class requirement here

    I had a bit of a look - do you think you could post a link to the guys in Germany with carbon frame

    I’ve seen a few racebike builds on here so may post a few pics of progress as I go

  5. #5
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    Started off making a swing arm - a mock up of prototype , to get all dimentions and support for stress areas looking right,also need to machine bearing housings and then thin the wall down in the center to shave off some weight ,wonder where to get swingarm hollow pins/axles??still need shock mount and axle adjuster partsClick image for larger version. 

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    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  6. #6
    apriliaforum expert mattology's Avatar
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    nice!

    Get your confidence back with Aprilia.

    caution: the use of motorcycles may be habit forming. side effects include purchasing multiple examples of the same bike, in different states of tune, different years, or different models altogether. some motorcycles may be not running when purchased. some parts are no longer available. there are rare instances where aprilias are bought over the internet and upon arrival, they are not as were originally disclosed. there is a small group of people who cannot handle two stroke engines and motorcycle maintenance. if this is the case, you may not be a candidate for Aprilia RS250's.

    Aprilia. Ask your doctor if the RS250 is right for you.

  7. #7
    apriliaforum newb
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    Hello - am trying to figure out which model motor I have
    this is what’s written ,not the ebe075 ,Click image for larger version. 

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  8. #8
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    Its propably an EBS engine. Senda bikes used that.

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