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Thread: CB/CL175 Chinese Copy Carbs ...

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    Junior Member michaelgj's Avatar
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    CB/CL175 Chinese Copy Carbs ...

    During my weekly window shopping exercise on Fleabay I noticed this (I think) new listing for CB/CL 175 carbs ....



    https://www.ebay.co.uk/itm/304703407...346c%7Ciid%3A1

    There’s nothing new in Chinese “copycat” 175 carbs of course but these are different in that they seem to be manufactured as LH and RH units whereas previous copies seemed to be two identical carbs ie. throttle stop and mixture screws on the same side of the carb.

    The photos are a bit confusing as it looks like they have been linked the wrong way round with the choke linkage so screws for both carbs are are on the inside.

    I just wondered if anyone has experience of these – a couple of months ago I was on the brink of ordering some Chinese copies but managed to nurse mine back to reality thanks to the carb set up advice on this site.
    1973 Honda CB175 K6

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    Benevolent Dictator ancientdad's Avatar
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    Moved to Smaller Twins Carburetion section.

    VHT member Richard Pitman has a set of Chinese carbs and I believe he might be using a set of them on one of his 175s. I'm sure he'll have some observations.
    (move along, nothing to see here)

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    Senior Member Hondaholic's Avatar
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    Wow! Nice to know there is ANOTHER CB175 in Worcestershire UK!

    I'm no help with info on the Chinese product, because, like you, I 'recovered' mine with ultrasonic cleaning and a pack of goodies from David Silver (Where would we be without him?)

    However, the ones you have shown do look exceptionally good with a reasonable price. Their performance though, will be the test.
    1970 CB175 K4 (UK version)

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    Junior Member michaelgj's Avatar
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    Quote Originally Posted by Hondaholic View Post
    Wow! Nice to know there is ANOTHER CB175 in Worcestershire UK!
    Yes indeed although my CB175 is probably the Cinderella of the county so far as condition is concerned, but she starts and stops (for now at least) and keeps me occupied !
    1973 Honda CB175 K6

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    If you look closely at the photo in the advert you'll see that the carbs are facing in opposite directions, so in fact they are same as the other Chinese pairs, two right hand carbs.


    EDIT - I take that back, it's me who needs to look more closely !! They are indeed a left and right hand pair. However, I'm a bit confused about the odd bits at the top of the carb, is this is what used to be called a power valve on some older Keihin carbs. Not present on the CB175/200 carbs.

    I've got a set of the generic Chinese carbs on my SL 175 alike, and a set of the original Wincycles carbs on the CL175. Fitted with Keihin brassware, they work OK. Floats and float valve are actually an improvement over the Keihin parts, leak and dent proof nylon floats with teflon ( or similar rubbery stuff ) tipped float needle valves, just like modern carbs. Needle is captive on the float, makes installation easier when working on the carbs fitted to the bike.

    My CB175 is on it's original carbs, ultrasonically cleaned, and I have to say that it starts and idles better than the Chinese equipped bikes, full throttle same across all three.

    Last edited by Richard Pitman; 11.16.22 at 12:45 PM. Reason: Got it wrong again
    1972 CL175K7
    1970 CB174K4, 'upgraded' to a K6 alike
    1971 SL175, with a few non standard parts !
    1998 CB600 Hornet

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    This is the part that I don't understand. Enlighten me someone please ??

    1972 CL175K7
    1970 CB174K4, 'upgraded' to a K6 alike
    1971 SL175, with a few non standard parts !
    1998 CB600 Hornet

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    Junior Member michaelgj's Avatar
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    Thanks Richard, that's really useful feedback and sounds like I'm right to persevere with the Honda originals then based on your experience.

    I can't answer your question about the possible "power valve", not that I have the faintest idea what one of those is, but I'm sure someone will be along to educate us .

    Thanks again
    1973 Honda CB175 K6

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    Senior Member Hondaholic's Avatar
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    Quote Originally Posted by michaelgj View Post
    Yes indeed although my CB175 is probably the Cinderella of the county so far as condition is concerned . . .
    Maybe so, but a bit of dressing up and a ball gown she could end up like this:





    Last edited by ancientdad; 11.16.22 at 3:57 PM.
    1970 CB175 K4 (UK version)

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    Quote Originally Posted by michaelgj View Post
    Thanks Richard, that's really useful feedback and sounds like I'm right to persevere with the Honda originals then based on your experience.

    I can't answer your question about the possible "power valve", not that I have the faintest idea what one of those is, but I'm sure someone will be along to educate us .

    Thanks again
    I certainly would think twice about buying the carbs in the advert you've linked to here. Looks as though you'd need to rig up another petrol feed to the power jet, if that is indeed what it is.
    1972 CL175K7
    1970 CB174K4, 'upgraded' to a K6 alike
    1971 SL175, with a few non standard parts !
    1998 CB600 Hornet

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    And while we are posting photos off what could be, this is my K4 after I initially 'restored' it.



    But I really wanted a K6, so it soon morphed into this. I already had the K6 tank and seat, just needed a later frame.

    1972 CL175K7
    1970 CB174K4, 'upgraded' to a K6 alike
    1971 SL175, with a few non standard parts !
    1998 CB600 Hornet

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    Junior Member michaelgj's Avatar
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    Quote Originally Posted by Hondaholic View Post
    Maybe so, but a bit of dressing up and a ball gown she could end up like this:
    Gorgeous ... similar colour as mine but there the similarities end I think ...

    Here's mine on the day I bought her.

    s-l1600.jpg

    Have since sorted out most of the cobbled together wiring, highly imaginitive cable routing, added new mirrors, coil, condenser, points, DS exhausts, DS shock absorbers and fixed numerous other general ****-ups. Another five years and she might just be up to your standard .
    Last edited by michaelgj; 11.16.22 at 4:41 PM. Reason: Added quote
    1973 Honda CB175 K6

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    Junior Member michaelgj's Avatar
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    Quote Originally Posted by Richard Pitman View Post
    But I really wanted a K6, so it soon morphed into this. I already had the K6 tank and seat, just needed a later frame.
    V nice ... mine is definitely the poor cousin of this county
    1973 Honda CB175 K6

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    Senior Member jensen's Avatar
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    Power jets, same as on the European CB72 carburettors. More info about the power jets https://www.vintagehondatwins.com/fo...ent-in-details
    <a href=https://www.vintagehondatwins.com/forums/image.php?u=26&type=sigpic&dateline=1663782826 target=_blank>https://www.vintagehondatwins.com/fo...ine=1663782826</a>
    CB450's (K0's, K1's, K2's), CB72'61-'67, all years, C77'64, CB400f '74, Kawasaki KR1-s '90

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    Quote Originally Posted by jensen View Post
    Power jets, same as on the European CB72 carburettors. More info about the power jets https://www.vintagehondatwins.com/fo...ent-in-details
    Thanks Jensen, that's interesting and informative. So, not an extra fuel hose onto that exposed jet, but an air hose from the air filter ?

    Reading elsewhere on the 'net, these carbs have a smaller main jet, with the power jet system kicking in at full throttle to add extra fuel/air mix direct into the venturi, if I've read this correctly.
    1972 CL175K7
    1970 CB174K4, 'upgraded' to a K6 alike
    1971 SL175, with a few non standard parts !
    1998 CB600 Hornet

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    Senior Member jensen's Avatar
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    Happy I could add and share some relevant information. Yes, a tube of filtered air from the air filter indeed, at least that's the case with the CB72 carbs. If you look at the CMSnl website and take a look carefully at the exploded views of the CB72's you'll see it.
    Yes, like I explained in the other thread, that's the case, the vacuum is controlling the amount of fuel injected direct into the venture.
    <a href=https://www.vintagehondatwins.com/forums/image.php?u=26&type=sigpic&dateline=1663782826 target=_blank>https://www.vintagehondatwins.com/fo...ine=1663782826</a>
    CB450's (K0's, K1's, K2's), CB72'61-'67, all years, C77'64, CB400f '74, Kawasaki KR1-s '90

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    Junior Member michaelgj's Avatar
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    Quote Originally Posted by jensen View Post
    Happy I could add and share some relevant information. Yes, a tube of filtered air from the air filter indeed, at least that's the case with the CB72 carbs. If you look at the CMSnl website and take a look carefully at the exploded views of the CB72's you'll see it.
    Yes, like I explained in the other thread, that's the case, the vacuum is controlling the amount of fuel injected direct into the venture.
    I won't pretend to understand all this but nonetheless appreciate you and Richard taking the time to explain the differences. It has definitely convinced me to stick with Honda/Keihin's finest even if they are 50 years old !

    Thanks again.
    1973 Honda CB175 K6

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