1973 Honda CB350 - how much power?

Discussion in 'Motorbike Technical Discussion' started by Ig, Mar 13, 2007.

  1. Sure: if unlimited power is available. The internal combustion engine
    does not supply unlimited power.
    Mark Clements, Mar 18, 2007
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  2. I'm beginning to wonder if we aren't being subtly trolled here. *Nobody*
    can be that ignorant of basic physics and mechanics, can they?
    The Older Gentleman, Mar 18, 2007
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  3. Ig

    John Johnson Guest

    Yes, yes they can. It's been said that most people are more-or-less
    Aristotelians in their view of the world, and Zaphod certainly gives a
    number of statements that would agree nicely with Aristotelian physics.
    I've run into many other who believe similarly. The problem, as you
    point out so often WRT B-12, isn't the ignorance so much as the
    presentation of ignorance as knowledge.

    Learning enough mechanics and aerodynamics to get a solid understanding
    of the matter isn't difficult (from where I sit, but wait), but it's not
    trivial either. I still get physics stuff wrong regularly, and I'm far
    better at it than most my friends who aren't either physicists or
    Think of this question: where is the power that increases the top speed
    coming from? Surely it takes more power to push a given machine faster?
    Changing gearing doesn't change the hp output of the machine, so how
    does it increase the top speed rather than only the time to reach top

    Remember that we're not talking about distance-limited speed here, but
    the speed achievable if we've got an unlimited straight distance to run.


    'indiana' is a 'nolnn' and 'hoosier' is a 'solkk'. Indiana doesn't solkk.
    John Johnson, Mar 18, 2007
  4. Ig

    mk10 Guest

    I must admit that this thread has indeed been amusing the past few
    days...however all good things must come to an end...

    ZB, just admit:

    - your speedo probably read high about 10% (not uncommon for Japanese bikes
    from that era and also of today)

    - you were young and probably exaggerated a bit to the police/friends when
    talking about your crash

    - since it happened such a long time ago, your memory recollection wasn't
    entirely accurate

    You thought you were going 120mph, however in light of the facts presented,
    you now realize that speed was impossible to attain and you were probably
    only going about 85-90mph (which is still more than respectable and
    ridiculously fast for that squirrelly, crappy handling bike).

    Save face, admit your mistake, apologize, and let's move on.

    mk10, Mar 18, 2007
  5. Only if the existing gearing on the machine causes the engine RPM to
    go higher than it's powerband at top speed.

    What is happening on the stock machines is that due to gearing the
    engine power starts falling off at higher and higher speeds, so an
    equilibrium is reached between the wind drag and the engine output
    power such that the machine will not go faster than a certain speed.

    If you make the gearing taller you MAY make the engine RPM go
    back into it's powerband and so at higher speeds have more available
    horsepower and so a new equilibrium is reached that is at a higher speed.
    Of course you may lose accelleration at lower end if you do not adjust
    your shift points.
    maybe maybe not it all depends on how the factory did it.
    Ah, not exactly.

    Ted Mittelstaedt, Mar 19, 2007
  6. Ig

    Grizz Guest

    Ig wrote:
    My first reliable bike (after a short lived Kawasaki A1, SN A1 00000
    fifty something that melted it's engine)
    was a KZ400, my friend had a CB350 and we took a road trip around the
    north end of lake Superior together.

    For the first several days I wondered why my friend always wanted
    a rest stop before I needed one ... then we switched bikes.

    The 350 was fine up to about 50 MPH, but at higher speeds it had
    too much engine vibration, wasn't comfortable to ride on the highway.
    Would be a fine city bike but I wouldn't get it if you're planning
    on spending much time at highway speeds. We were normally traveling
    about 75 MPH, my KZ400 was smooth at that speed, but the CB350 would
    buzz yer kidneys off.
    Grizz, Mar 20, 2007
  7. i own a 1971 350cb and ive had it up to 95 mph
    samual.witkamp, Aug 5, 2015
  8. Ig

    Futility Man Guest

    You also just replied to an 8 year old pissing contest that was over long ago.
    But I'm sure they're glad to hear from you.

    I had a '74 CB360 and while it would eventually do 90 with a light passenger, I
    wouldn't want to do it very often. And I doubt if it would do 100.
    Futility Man, Aug 6, 2015
  9. yea the 360 had a poor frame, pretty loose. KB
    Kevin Bottorff, Aug 6, 2015
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