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Thread: Bent Steel Frame

  1. #1
    Member Rick T.'s Avatar
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    Bent Steel Frame

    Can a bent steel frame (older CBR 600s) be "bent back" satisfactorily as not to become a time-bomb - i.e. breaking (snapping) again down the road? I know aluminum cannot be bent back safely - but is it not the same for steel frames?

    In other words - can a CBR 600F3 with a "bent-back-into-place" frame be "safe" enough as a track bike...?
    Rick T.
    '12 Ducati SF848
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  2. #2
    Member rocktboy's Avatar
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    it's prolly going to depend on how much "bending" was performed, it's location...etc....your best bet is to bring it to a shop that specializes in straightening bent bike frames and ask them for their expert opinion.......i've had a f3, it's super easy to go fast and learn on...great track bike. good luck.
    member of rat's nest off-roading club.

  3. #3
    Member Rick T.'s Avatar
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    Thanks Jack. Any recommendations on local shops that can do this for me...?
    Rick T.
    '12 Ducati SF848
    '01 Ducati M900RRS
    '00.5 Aprilia Mille R
    '02 Malaguti Yesterday 50

  4. #4
    Senior Member UglyDogRacing's Avatar
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    Re: Bent Steel Frame

    Quote Originally Posted by Rick T.
    Can a bent steel frame (older CBR 600s) be "bent back" satisfactorily as not to become a time-bomb - i.e. breaking (snapping) again down the road? I know aluminum cannot be bent back safely - but is it not the same for steel frames?

    In other words - can a CBR 600F3 with a "bent-back-into-place" frame be "safe" enough as a track bike...?
    Aluminum frames can safely be straightened. As for steel, I am not sure. Tony Baker is the best in town at straightening and does all the MRA bikes. His # is 720-232-0998.
    Motorcycle Roadracing Association #29
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  5. #5
    Member Rick T.'s Avatar
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    Thanks Jim. I want to see this bike and will use your contact when I have the bike checked out...

    BTW, I always thought that aluminum could NOT be bent back "safely" because bending causes structural weakness and may cause cracking/breaking at earlier stress loads. At least for my bicycle frame/parts that's the case... Thanks for the insight.
    Rick T.
    '12 Ducati SF848
    '01 Ducati M900RRS
    '00.5 Aprilia Mille R
    '02 Malaguti Yesterday 50

  6. #6
    Member Bryce's Avatar
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    I would imagine if the frame was bent severely it might have fatigue issues but most frames are little more than tweaked
    Bryce Random racing #814

  7. #7
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    bending aluminum causes it to work harden and become brittle. But you can bend it and straighten it a little depending on how much and where.
    Steel is the same way but is much less brittle than most aluminums...

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