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Thread: K75 mpg

  1. #1
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    K75 mpg

    Thinking of picking up a low mileage (35K) K75RT. What kind of mileage do most of you get on the road at 75mph? Is the early ABS mostly trouble free? Thanks

  2. #2
    40 mpg
    yes
    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://web.bigbend.net/~glaves/

  3. #3
    Nick Kennedy
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    I got a 1990 K75 RT
    I get about the same mpg Paul says
    When its over about 90f ambient temp thou I don't like to ride it , to much motor heat for me.
    In the cooler months thou its is SOOO Nice!
    Love that machine!!
    Reliable and very low maintenance.

  4. #4
    The heat issue is true of the RT. Not so much on the S model or the standard model with no fairing - just a windshield.
    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://web.bigbend.net/~glaves/

  5. #5
    Registered User WalterK75's Avatar
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    My 1991 K75RT averages 51 mpg, but I don't ride much at 70 mph.
    Walter

    "Sometimes I wonder if the world is being run by smart people who are putting us on, or by imbeciles who really mean it." Mark Twain

  6. #6
    RK Ryder
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    Quote Originally Posted by WalterK75 View Post
    My 1991 K75RT averages 51 mpg, but I don't ride much at 70 mph.
    Is that Imperial or American mph, Walter?
    Paul F. Ruffell
    Retired and riding my RTs, the '87 K100 & the '98 R1100 !
    Niagara Riders & Knights of the Roundel #333

  7. #7
    Registered User WalterK75's Avatar
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    Quote Originally Posted by Paul_F View Post
    Is that Imperial or American mph, Walter?
    I used American miles per gallon as most of the readers here are American. Imperial mpg is about 61.4 for you Canadians. Or how I actually refer to fuel consmption, 4.6 liters per 100 kms.
    Walter

    "Sometimes I wonder if the world is being run by smart people who are putting us on, or by imbeciles who really mean it." Mark Twain

  8. #8
    RK Ryder
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    Quote Originally Posted by WalterK75 View Post
    I used American miles per gallon as most of the readers here are American. Imperial mpg is about 61.4 for you Canadians. Or how I actually refer to fuel consmption, 4.6 liters per 100 kms.
    I wish that my K100 or R1100's 48 (Imperial) mpg could come close to what you get on your K75, Walter. I had a choice of two K RTs and I do regret not buying the K75.
    Paul F. Ruffell
    Retired and riding my RTs, the '87 K100 & the '98 R1100 !
    Niagara Riders & Knights of the Roundel #333

  9. #9
    Registered User WalterK75's Avatar
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    Quote Originally Posted by Paul_F View Post
    I wish that my K100 or R1100's 48 (Imperial) mpg could come close to what you get on your K75, Walter. I had a choice of two K RTs and I do regret not buying the K75.
    I'm also running a 750 cc engine and yours are bigger. You may also be a faster rider than I am.
    Walter

    "Sometimes I wonder if the world is being run by smart people who are putting us on, or by imbeciles who really mean it." Mark Twain

  10. #10
    Registered User drneo66's Avatar
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    Stats from my 1995 K75S

    Miles 61,316
    Cost $4,088.01
    Gallons 1,507.348
    Miles Per Gallon 40.70
    Price Per Gallon $2.71
    Cost Per Fillup $8.34
    Miles Per Fillup 125
    Gallons Per Fillup 3.076
    Litres 5,705.329
    Kilometers 98,679
    Kilometers Per Litre 17.300

    MPG did go up slightly after I had the injectors cleaned by Mr. Injector. I had the Aeroflow windshield and extender as well as top box installed, so I'm sure that cut down on mileage some.

    This bike had done quite a bit at 70+ mph including a 48/10, SS2000, BBS, multiple SS1000's, and then was a part of the MN record ride.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  11. #11
    RK Ryder
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    Quote Originally Posted by WalterK75 View Post
    I'm also running a 750 cc engine and yours are bigger. You may also be a faster rider than I am.
    After a couple of years of ownership, I noticed a decrease in fuel mileage. Shortly after that, I installed a Fuel Plus computer that showed among many things, my actual consumption as used in real time. It turns out that my right wrist leaving from a stop was the cause of the decrease in fuel mileage. I have since rectified that problem.
    Paul F. Ruffell
    Retired and riding my RTs, the '87 K100 & the '98 R1100 !
    Niagara Riders & Knights of the Roundel #333

  12. #12
    RK Ryder
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    Quote Originally Posted by drneo66 View Post
    Stats from my 1995 K75S

    Miles 61,316
    Cost $4,088.01
    Gallons 1,507.348
    Miles Per Gallon 40.70
    Price Per Gallon $2.71
    Cost Per Fillup $8.34
    Miles Per Fillup 125
    Gallons Per Fillup 3.076
    Litres 5,705.329
    Kilometers 98,679
    Kilometers Per Litre 17.300

    MPG did go up slightly after I had the injectors cleaned by Mr. Injector. I had the Aeroflow windshield and extender as well as top box installed, so I'm sure that cut down on mileage some.

    This bike had done quite a bit at 70+ mph including a 48/10, SS2000, BBS, multiple SS1000's, and then was a part of the MN record ride.
    Although I have kept all fuel receipts, your recording far exceeds mine.

    My bike does not have a fuel gauge but like you, I keep track of the kilometres per litre for refuelling. For both my bikes, I average about 16 kilometres per litre. Hence, after 200 kilometres on the K100 I like to fill up again between that number and 250, just before the reserve light comes on. The furthest that I have travelled on one tank of gas on my K100 is 308 km. The bike is currently a few kilometres short of 268,000.

    I don't know about yours' and Walter's bikes, but when the reserve light does come on between 250 - 270 km (and there should still be a fair amount of gas left in the bike), it does not like to go too far with out fresh fuel as within a short distance, it fails to continue to run smoothly (especially if there are any hills involved). This is has never been the case with my R1100RT when the reserve light comes on.

    Does anyone else experience this roughness after the reserve light comes on with their Brick?
    Paul F. Ruffell
    Retired and riding my RTs, the '87 K100 & the '98 R1100 !
    Niagara Riders & Knights of the Roundel #333

  13. #13
    Registered User drneo66's Avatar
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    Quote Originally Posted by Paul_F View Post

    Does anyone else experience this roughness after the reserve light comes on with their Brick?
    You may have a temperamental/almost failing fuel pump.

    Since the fuel pump is cooled by the gas, or what's left of it after running the tank down, I rarely ran my gas tank farther than when the low fuel light warning came on. As you probably know, the K-bike fuel tank and fuel can get quite hot as it circulates throughout the system. Low fuel around the pump means they aren't running very cool.

    After blasting across South Dakota once with the temps in the low 100's, I was able to see fuel vapors evaporating out of the overflow tube... it's no wonder I had such bad gas mileage...
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

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