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Thread: Maximum speed for 92 K75S with Aeroflow screen

  1. #1
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    Maximum speed for 92 K75S with Aeroflow screen

    What might be the maximum speed for a 92 K75S with Aeroflow screen? I was searching here last night and saw an advertised top speed of 125 or 130 mph, so that gives me a notion of what to expect. I've pushed her to 90, but then started to imagine the wind screen failure mode.
    Dave
    '92 K75S, '08 F800ST
    Cedar Falls, IA

  2. #2
    Benchwrenching PGlaves's Avatar
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    Quote Originally Posted by rx35285 View Post
    What might be the maximum speed for a 92 K75S with Aeroflow screen? I was searching here last night and saw an advertised top speed of 125 or 130 mph, so that gives me a notion of what to expect. I've pushed her to 90, but then started to imagine the wind screen failure mode.
    At redline, where the rev limiter cuts in, a K75 with stock tires and stock gearing would go 133 mph if the engine develops enough horsepower to overcome drag. Add bags and a larger fairing and the HP vs drag becomes the limitation. I think in real world conditions with bags and oversized wind screen you might expect 110, maybe 115 max with a perfectly tuned healthy engine.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://www.bigbend.net/users/glaves

  3. #3
    Mars needs women! 35634's Avatar
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    I concur, 110-115. Windshield mounts can pull out, had that happen with my Parabellum at about 80mph many years ago. Thing flew over my head and got run over by a semi behind me. I replaced the stock mounts with nylon license plate nuts, no problems since with an Aeroflow.
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  4. #4
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    Thanks for the helpful information. This helps to minimize the need to find the maximum speed myself and gives me another preventive maintenance item.
    Dave
    '92 K75S, '08 F800ST
    Cedar Falls, IA

  5. #5
    3 Red Bricks
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    If your bike has the stock stickers under the seat, you will find that they recommend no higher than 90mph with the STOCK windscreen.

    The airflow is taller and thereby would generate more leverage on the screws. The S windscreen is effectively held on by only the two lower screws. The upper screws are pretty much at the hinge (fulcrum) point of the windscreen. The lower screws are only held in by push in plastic pieces.

    Higher speed and taller windscreen are not a good combination. Have heard of several Ss losing their screens. Stock height screen and new bushings help.



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    Lee Fulton Forum Moderator
    3 Marakesh Red K75Ss
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  6. #6
    Nick Kennedy
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    Aside from the potential fastener failure issue and loss of the windshield, another issue I have found is that when riding fast in any wind, is that it can be challenging and dangerous due to the large wind force on a fixed object like a windscreen. When your haulin on a naked bike and get hit by a side gust, you can quickly duck down and minimize the side force. With a windshield, not so much. On both my RT's I try and limit the high speed stuff to no wind conditions, then its much more manageable, for me.
    The wind force increases something like the square of the MPH increase. Not to hijack the tread, but I thought this would be good food for thought.
    FWIW at 5-7000' MSL My K75RT seems to top out about about 112-115 mph, not bad for 750 cc

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