CB175 big bore kits, question.
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CB175 big bore kits, question.

This is a discussion on CB175 big bore kits, question. within the Technical forums, part of the Caferacer.net Forums category; Has anyone here used a cb175 big bore kit? Is there any real advantage to using one on the street around town? Overheating? If anyone ...

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  1. #1
    s1b
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    CB175 big bore kits, question.

    Has anyone here used a cb175 big bore kit? Is there any real advantage to using one on the street around town? Overheating? If anyone could educate me, please do!

  2. #2
    Senior Member Teazer's Avatar
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    Do you have a particular "big bore kit" in mind that you would like comments on?

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    s1b
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    Wasn't looking at any particular kits. I guess I'm just asking "in general". If you have any kit you recommend, please do! What would be the positives and negatives of this? Is there a better direction to go instead?

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    Senior Member Teazer's Avatar
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    I don't know of any. I was rather hoping that you had seen one and were inquiring about it.

    Someone has 56 or 57mm pistons available and I know you can get oversize head gaskets for Cometic. You'll probably need to bore the cylinder for thicker sleeves to bore out for those big pistons. It can be an expensive option for a street bike unless you are good in the machine shop.

    Someone should be along shortly that has years of Cb160/175 experience that can point you in the right direction.

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    Senior Member Teazer's Avatar
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    I don't know of any. I was rather hoping that you had seen one and were inquiring about it.

    Someone has 56 or 57mm pistons available and I know you can get oversize head gaskets for Cometic. You'll probably need to bore the cylinder for thicker sleeves to bore out for those big pistons. It can be an expensive option for a street bike unless you are good in the machine shop.

    Someone should be along shortly that has years of Cb160/175 experience that can point you in the right direction.

  7. #6
    s1b
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    Teazer, this is one kit I've run across.

    http://rogersmotorcycleparts.com/BigBoreKits.htm

  8. #7
    s1b
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    Teazer, this is one kit I've run across.

    http://rogersmotorcycleparts.com/BigBoreKits.htm

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    Senior Member crazypj's Avatar
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    56mm is stock for most Honda 125 (and also CB500f.)
    Plus,late 60's's CB250 and later CB/CJ250 are 56mm
    They have various pistons configurations, domed, flat and dished.
    All you need is a friendly parts guy and some time going through parts 'books'
    Last time I did one was 1974, forgotten a lot of stuff since then
    I dabble in rocket science, when I\'m not picking my nose
    The other night I gave my girlfriend an orgasm, but, she spat it back at me

    'you can take my word for it or argue until you find out I'm right'

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    Senior Member crazypj's Avatar
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    56mm is stock for most Honda 125 (and also CB500f.)
    Plus,late 60's's CB250 and later CB/CJ250 are 56mm
    They have various pistons configurations, domed, flat and dished.
    All you need is a friendly parts guy and some time going through parts 'books'
    Last time I did one was 1974, forgotten a lot of stuff since then
    I dabble in rocket science, when I\'m not picking my nose
    The other night I gave my girlfriend an orgasm, but, she spat it back at me

    'you can take my word for it or argue until you find out I'm right'

  11. #10
    Senior Member hahnda's Avatar
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    I think I have head gaskets for the 175 +3mm big bore kit but not the pistons and rings.
    http://www.scramblercycle.com

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