Any future in air-cooled?

Discussion in 'Motorbike Technical Discussion' started by The Older Gentleman, Feb 25, 2008.

  1. <G>

    I knew I'd catch someone :))

    And the 900R wasn't the first water-cooled across the frame four the
    Japs built, either. Oddly enough. Lots of people think it was, but
    they're wrong.

    In early 1983, one of the Big Four made a DOHC 16-valve water-cooled
    across the frame four, but it sank into near obscurity. A virtual pint
    for anyone who can name it.
     
    The Older Gentleman, Feb 26, 2008
    #21
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  2. Coughyamahaxs750xs850cough
     
    The Older Gentleman, Feb 26, 2008
    #22
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  3. Wrong! See other posting. And besides, aren't you forgetting the Honda
    VF750 and other early vees?
     
    The Older Gentleman, Feb 26, 2008
    #23
  4. The Older Gentleman

    Doug Payne Guest

    :) I only knew because I've always had a thing for triples. In the
    early 70s I had a BSA Rocket 3 and a Kaw H1 and I always lusted after
    the modern Trident. It's snowing here too. Sigh.
     
    Doug Payne, Feb 26, 2008
    #24
  5. I had an H1D. Wonderful and dreadful machine. I preferred the 400. The
    250 was fun, but a bit wet. The 400 was definitely the best of the
    three, all-round.

    I still hanker after an H2C, mind.
     
    The Older Gentleman, Feb 26, 2008
    #25
  6. The Older Gentleman

    tomorrow Guest

    Yeah, yeah, yeah. Serves me right for not thinking more critically!
     
    tomorrow, Feb 26, 2008
    #26
  7. The Older Gentleman

    Doug Payne Guest

    The H1 scared me like nothing else has since. And I loved it. It was
    certainly a piece of crap by today's standards, but man oh man, did it
    kick ass in a straight line. Stopping was of course a whole 'nother
    thing. If I close my eyes, I can still see the 2-tone blue paint job
    that perfectly matched the smoke out the back, usually obscuring the
    rich guy behind me in his 'Vette. My then-wife once told me that if I
    made her a widow on that thing she'd kill me. Again.
     
    Doug Payne, Feb 26, 2008
    #27
  8. The Older Gentleman

    Timo Geusch Guest

    The reason they're doing that is because both run very lean from the
    factory (I think the Harley even more than the BMW) in order to pass
    emissions legislation. And obviously the
    I think it's worse on the very latest ones (1550cc twin cams) as they
    supposedly run extremely lean thanks to the wonders of modern engine
    management.
    I think that's a "yes and no". Both engines share the same basic layout
    with their older siblings but are substantially different. That said,
    both are very large capacity and thus slow-revving twins, which is a
    layout that doesn't really lend itself to low emissions (partially
    because you've got rather big combustion chambers so you tend to get
    incomplete burns).
     
    Timo Geusch, Feb 26, 2008
    #28
  9. The Older Gentleman

    Bob Scott Guest

    Cor, I must have missed the water cooled XSs.

    Never actually ridden an XS triple, must remedy that sometime. I suppose
    I should mooch a play on a K75 & a Meriden Trident as well to get me
    nearer completing the set of triples.
     
    Bob Scott, Feb 26, 2008
    #29
  10. The Older Gentleman

    Bob Scott Guest

    Nope, I was careful to specify four stroke because both Suzuki & Honda
    had made 2 stroke water cooled triples.
    BMW were making the triples from the early '80s on. Dunno when they
    stopped.
     
    Bob Scott, Feb 26, 2008
    #30
  11. The Older Gentleman

    tomorrow Guest

    I had a 1979 XS750F Yamaha triple, and I can't for the life of me
    recall it being water-cooled. I did own both a 1997 Triumph T509
    Speed Triple and a 1999 955i Speed Triple, and both of them were
    indeed liquid cooled. And really, really, fun bikes to boot!
     
    tomorrow, Feb 26, 2008
    #31
  12. Heh. It's a lovely trick question, all the same.
     
    The Older Gentleman, Feb 26, 2008
    #32
  13. I think that is an admirable summation.

    <Touches forelock>
     
    The Older Gentleman, Feb 26, 2008
    #33
  14. Heh. Good point; my bad.
    Surprisingly good to ride, especially the 850. Shame about the
    mechanical integrity.
     
    The Older Gentleman, Feb 26, 2008
    #34
  15. The K75 was launched in 1985. Production continued until the mid-1990s -
    I can't recall the exact year. 1995-96, I think.
     
    The Older Gentleman, Feb 26, 2008
    #35
  16. The Older Gentleman

    Bob Scott Guest

    Hmmm, let me think. '83? Near obscurity? That'd be around the tail end
    of Yamaha & Honda building as many dumb things as possible.

    For some reason I'm expecting it to be a 400 or even a 250 but it's
    probably not. Hmmm some more.

    GSX400W?

    (I'll admit it, I googled)
     
    Bob Scott, Feb 26, 2008
    #36
  17. The Older Gentleman

    Timo Geusch Guest

    CBA to go downstairs to check (and BMW seems to have removed the link to
    their 'history') but this sounds about right. I think they were pretty
    much phased out around the time the K1100s came in but with a certain
    overlap, which would put it somewhere in the 94-96 range.
     
    Timo Geusch, Feb 26, 2008
    #37
  18. The Older Gentleman

    Bob Scott Guest

    Can't really class 85 as early '80s, can I? Oh well, I remembered K75s
    as having been around when I started riding bikes[1] so assumed they'd
    appeared earlier than they had.

    Best stop wasting time online & go finish sorting the triple indicators
    - 3 of them work so I'll be dismangling the 4th one & cannibalising the
    broken ones to see if I can get all 4 to work. Then I need to get the
    front brake light to work. Joy, I hate electrics.

    Bob

    [1] my mate taught me to ride (the basics anyway) on his Dad's B25 one
    Sunday in the local industrial estate. Summer 85 I reckon that was.
     
    Bob Scott, Feb 26, 2008
    #38
  19. Close enough. GSX400FW, in fact.

    Built for the Japanese 400cc market, but a very few came over to Europe
    for evaluation by various importers.

    Suzuki Sweden had one. I rode it in the summer of 1983, hammering it
    down forest roads. As smooth as anything, very revvy, light handling,
    but actually not as quick as the spec suggested it ought to be. The
    write-up appeared in Superbike that autumn. A couple of months later
    Kawasaki announced the 900R.

    It's odd, isn't it? That little Suzuki is actually a historic bike, but
    hardly anyone has ever heard of it, still less ridden it.

    This month's issue of Classic & Motorcycle Mechanics, though, has a pic
    and a correct date check.

    And people still call the Kawasaki 900R the first Jap water-cooled
    across the frame four. Because almost all the press make that claim. But
    they are (and were) wrong.

    IOU a virtual pint. What's your poison?
     
    The Older Gentleman, Feb 26, 2008
    #39
  20. A double check shows that the original K75C was, indeed, launched in
    1985. The S followed a year later.

    Both models were discontinued in 1995, but the final version of the
    K75RT lasted until 1996.

    That's in the UK, anyway. It's possible that other markets had the bikes
    for longer.
     
    The Older Gentleman, Feb 26, 2008
    #40
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