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Thread: Whats your R100 getting for mileage?

  1. #16
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    1983 R100RS, 69K miles. New AM26 tires, proper inch sizes, stock rear. Recent carb rebuild. Top end n rings done winter 2009. Two recent trips fully loaded with camping gear were 1300 miles and 800 miles. First was the BRP + NC backroads and the second was NYS backroads with 100 miles of slab. MPG calculated over the total distance was 51+.

    I only calculate the mpg over several tanks due to variations from tank to tank in how I fill it - where in the neck, side stand or center stand, etc. Nice range.

    The '75 R75/6 does almost as well but that engine and those carbs really need work this coming winter. Should do better next summer.

  2. #17
    Minnesota Nice! braddog's Avatar
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    '77 R100RS, 40 mm pipes and carbs, gets about 34-35 MPG commuting, freeway speeds. I use 92 octane with ethanol. When I'm able to fill up with non-ethanol, 93 octane fuel, I can push over 40 mpg. Ethanol is not good for mileage.

    The bike is in great tune right now, runs like a clock, I'm not changing anything.

    My 77 R100S with the lightened flywheel, etc. etc. gets a little better than the RS, but not too much.
    -----------------------------------------
    Brad D. - Member #105766
    '77 R100RS - Black Beauty (big pipe, baby!)
    '94 R1100RS - Sylvia

  3. #18
    rocketman
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    210 miles before reserve at 5.2 gallon used, 78 R100T vetter, hard bags, mostly twistys, running mostly 4th gear at between 3.6K to 5.5K average at 4.5K rpms when running the back roads at 60-65 MPH.. so around 40-42 with new engine. before with 150K on old engine 32-34. always use high test 92 or 93. the few times I put non-ethenol in it about the same for a tank full but since there is always a little in when I fill up didn't expect to see much differance esp. for a single tank full.

    RM

  4. #19
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    1980 RT stock fairing, no lowers, bags, dual plugged 38-48, usually about 43 mixed-use

    1982 RT stock fairing, no lowers, bags 37-40 usually about 39 mixed-use

    I run 87 octane gas/ethanol swill in both. Live at 5200'. Work commute, shop, wander, whatever. High winds plus high speed here can really plummet mileage.

  5. #20
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    I am getting between 36 to 40mpg(mixed use) on my '91 R100GS - Euro version. Recent new rings and guides 2500mi ago... hoping the mileage gets better with full work in.

    Weird that I can 55+ in my VW TDI and have room for 4.

    What have you done specially to improve your mileage?
    R's Graham
    1991 R100 GS "Bumble Bee" , 1981 R80G/S (work in progress)
    2010 Husaberg FE450
    Past BMWs: '68 R50/2, '77 R80/7, '87 R80GSPD, '76 R60/6, '85 K100RS

  6. #21
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    my '95 R100 GSPD

    consistently gets 36MPG no matter how much crap i put on it, or how hard i twist the throttle.
    Somers, NY

    Just enjoying the ride.......

  7. #22
    Registered User kwb210's Avatar
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    1977 R100/7 w/ 76,000 miles. stock size Avon Roadrider tires, w/o windshield 38-39 mpg, regardless of how it was ridden, then i just added a Parabelleum windshied and it now gets 44 mpg each tank at mostly cruising speeds in the 3500 to 4500 rpm range. The other day on a trip I was riding into a headwind, a crazy strong headwind, I noticed alot of windsurfers on the river...my mileage dropped to 28 mpg, wow. As soon as I was out of the wind, back to 44 mpg.
    1977 R100/7 1971.1972.1972.1973 R75/5
    1974 R90/6 multiple boxes
    Airhead Revival
    "Objects in the mirror appear to be losing" unk

  8. #23
    Mike V. #30064 30064's Avatar
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    78 R100/7, stock w/32mm flat tops, Luftmeister fairing...38 to 43 mpg on the average around town and short trips. On the open road it's much improved in the mid to high 40's. Hard to be efficient pushing a billboard across the United States.

  9. #24
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    Bags?

    Since my "other car" is a bike, and my "other bike" is a bike, everyday practicality reigns, and I run with bags almost 100% of the time.
    Based on seat-of-pants observation, throttle opening is less when I do run without bags. This becomes most obvious in the frequent winds here.

    Has anyone experimented with this?
    Is your stated mileage here with or without bags?

  10. #25
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    [QUOTE=grahamm;595944]I am getting between 36 to 40mpg(mixed use) on my '91 R100GS - Euro version. Recent new rings and guides 2500mi ago... hoping the mileage gets better with full work in./QUOTE]

    This is with Stock BMW bags, stock fairing, 200# rider.
    R's Graham
    1991 R100 GS "Bumble Bee" , 1981 R80G/S (work in progress)
    2010 Husaberg FE450
    Past BMWs: '68 R50/2, '77 R80/7, '87 R80GSPD, '76 R60/6, '85 K100RS

  11. #26
    Ran when parked! JRunner's Avatar
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    78 R100/7 no fairing. I get around 36 mpg
    Motorcycle = Mind eraser
    78 R100/7
    70 CL350
    94 Duc 900ss

  12. #27
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    r100 mileage

    For more gas mileage, the past issues of ON magazine, you could get a tranny kit to install .1st gear and 5th gears are changed higher bottom and lower top gear almost like an overdrive gear, lowers rpm for cruising.

  13. #28
    AKBob RAColeman's Avatar
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    Thanks Guys and

    Just to let you know. I got hooked up at Airhead Central when I got to Redmond.

    New Floats, Float Needle, Needle Jet and Jet Needle, from the nice lady at the bing booth.

    Had the bags off and went to the gas station, 40 Mi loop and filled it again.

    47.4 MPG. a gain of 15 MPG.
    Bob Coleman
    AKAM
    Fukengruver add umlaut
    '84 R100rt, '88 R100gs

  14. #29
    Chuck Weaver
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    Riviera, TX
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    Smile Gas Mileage

    1994 R100GSPD gets about 35 MPG if i ride sensibly.
    1995 R100 Mystik gets 41 MPG

  15. #30
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    1994 r100 gs

    I on average get 44 ...using a sigma bike odo which for the value is the ticket takes a bit to get it calibrated

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