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Thread: '95 K75 Poor MPG

  1. #1
    Registered User argent brick's Avatar
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    Aug 2012
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    Wine Country, Northern California
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    '95 K75 Poor MPG

    Well I finally checked my MPG and it is not very good. In town and highway combined is only about 30 mpg. I normally run Shell or Chevron fuel, so it is not that I use cheap gasoline.

    My bike is really cold blooded, REALLY COLD BLOODED, and will also die sometimes when I roll off the throttle. Also, the exhaust smell is very strong. The bike starts right back up, with out any problem.

    Any ideas?
    Lynn
    MOA #57883
    Current Ride: 1995 K75 Standard
    Past: 1978 Yamaha XS 750, 1976 BMW R60/6

  2. #2
    Benchwrenching PGlaves's Avatar
    Join Date
    Oct 2003
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    "Big Bend" TX
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    Quote Originally Posted by ARGENT BRICK View Post
    Well I finally checked my MPG and it is not very good. In town and highway combined is only about 30 mpg. I normally run Shell or Chevron fuel, so it is not that I use cheap gasoline.

    My bike is really cold blooded, REALLY COLD BLOODED, and will also die sometimes when I roll off the throttle. Also, the exhaust smell is very strong. The bike starts right back up, with out any problem.

    Any ideas?
    Two possibilities pop into my mind:

    1. You might have a faulty engine temperature sensor. (Screws into top of block)

    2. You might have a problem with the airflow meter. (Above the air filter).
    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
    3 Red Bricks
    Join Date
    Jan 2007
    Location
    Pleasanton, Ca.
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    3,345
    You also might have an exhaust valve that is too tight.

    There are many things that can cause your bike to run poorly. That's what I was telling you in the PM I sent you.



    LONG MAY YOUR BRICK FLY!

    Ride Safe, Ride Far, Ride Often

    Lee Fulton Forum Moderator
    3 Marakesh Red K75Ss
    Mine, Hers, Spare

  4. #4
    K75RT Keith
    Join Date
    Apr 2011
    Location
    Rocky River Ohio
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    51
    Let me ask all the silly questions at once.

    How many miles on the bike?
    What maintenance has been done and when?
    Last air filter change date?
    Are the brakes dragging?
    Do the wheels turn freely or are there bad bearings?
    When was the Last tune up?
    Last time the exhaust O2 was checked and the air sensor adjusted?
    Is the temp sensor working properly?
    Injectors cleaned?
    Last valve adjustment?
    Is the altitude pug installed?
    T.B.'s adjusted?

  5. #5
    Registered User
    Join Date
    Nov 2009
    Location
    Phila
    Posts
    50

    K100RS Poor MPG fixed

    My 85 K100RS with 100,000 mi ran with poor mileage one trip across country. When I came back it got a needed new fuel filter, new fuel rail pressure relief, it was running real high pressures, new engine temp sensor (precaution) and adjusted valves that were too tight. MPH went right back up to just over 40. Not sure which item helped the most they were done days apart but all within a couple weeks.

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