500T with 751A carbs - what float height do you use?
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Thread: 500T with 751A carbs - what float height do you use?

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    Junior Member d9canada's Avatar
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    500T with 751A carbs - what float height do you use?

    Hi, I've got a set of 500T carbs that I've cleaned up for a friend. I checked the float height before I started and both were about 26.4mm measure properly from the surface that the gasket will lay on, with the float barely touching the float needle's spring tip. The spec says the height should be 20mm. That's quite a change. I checked on Common-Motor because they've got a video. Their carbs were about 26mm before they set them too. So I'm curious if anyone can tell me from experience, rather than by the book, what works? Stock 500T with stock air box, etc.

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    Senior Member tbpmusic's Avatar
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    Here's the page from the Honda manual - 20 mm
    Attached Files Attached Files
    Bill Lane
    Honda Twins Founding Member

    No advice, just info

    '75 CB200T, '71 CB450 K4 Half-Breed, '72 CL350 (Sold), '81 CM200T, '72 C70M
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  3. #3
    Senior Member pattyandrick's Avatar
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    Floats generally sit level. Maybe measuring wrong? The manual should say how to measure it along with the spec

    Sent from my SM-J320V using Tapatalk

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    Junior Member d9canada's Avatar
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    Yeah I mentioned the spec (from FSM) is 20 but I was just surprised that these were set around 26 before I set them, and the same thing was encountered on the Common-Motor set.
    Thanks I do know how to set them and 20 makes them about level. I mainly work on fours and I was just surprised that both my set and the Common Motor set were around 26.
    Anyway, I'll give them to the owner and see what happens.
    Thank you!

  6. #5
    Senior Member tbpmusic's Avatar
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    Quote Originally Posted by d9canada View Post
    Yeah I mentioned the spec (from FSM) is 20 but I was just surprised that these were set around 26 before I set them, and the same thing was encountered on the Common-Motor set.
    Thanks I do know how to set them and 20 makes them about level. I mainly work on fours and I was just surprised that both my set and the Common Motor set were around 26.
    Anyway, I'll give them to the owner and see what happens.
    Thank you!
    People put too much confidence in what CCC says.
    76TWIN likes this.
    Bill Lane
    Honda Twins Founding Member

    No advice, just info

    '75 CB200T, '71 CB450 K4 Half-Breed, '72 CL350 (Sold), '81 CM200T, '72 C70M
    and a little red Chineeze scooter

    http://www.bikeexif.com/honda-cb450-restoration

  7. #6
    Senior Member ancientdad's Avatar
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    Quote Originally Posted by tbpmusic View Post
    People put too much confidence in what CCC says.
    Amen to that. I'd add, way too much at times.
    Tom

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    running points... because I'm too old for mysteries that begin with pushing

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    Senior Member 76TWIN's Avatar
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    Yeah. I definitely would not use any vids from CCC as gospel for sure.
    ancientdad likes this.
    '76 CB500T Frankenbike
    '73 CL450 (basket case for now)


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  9. #8
    Senior Member ancientdad's Avatar
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    Doesn't belong anywhere near a Bible for sure, or even a motorcycle bible for that matter. Imagine how many people that may well be using some of those methods... ugh
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  10. #9
    Senior Member 76TWIN's Avatar
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    Don't get me wrong, there's some good stuff to be had from their vids but just like anything on the internet, you kinda have to take them with a grain of salt.
    Always double/triple check with other sources
    '76 CB500T Frankenbike
    '73 CL450 (basket case for now)


    Carpe narem.

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