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Thread: '95 R100RT gas mileage

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    '95 R100RT gas mileage

    I'm fond of my '95 R100RT; but according to all the info I have come across, it gets lousy mileage. Every source claims about 52-54 mpg at a steady 55mph or so. I am not an aggresive rider. Most would say timid. My route to rural riding is through about 5 miles of 45mph town streets (no stop and go) and then open country for a leisurely ride. My last ride reflects what I have been getting every time I check mileage. From a full tank I put on 161 miles and needed 4.3 gallons to top off. Less than 40 mpg. Bike has had very recent dealer service with no problems reported, and plugs show no sign of running rich. Any ideas. thanks - Dick Otten SW Florida

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    Administrator 20774's Avatar
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    Probably wouldn't take much of an off-setting to make a difference but not see it on the plugs. Maybe the jet needle or needle jet is worn the carb...sounds like you run around mid-throttle most of the time which is the needle part of the circuit. Maybe you're choke doesn't go all the way off. I would hope the air filter is reasonably clean. Tire pressures? There's always a lot of discussion about that...I think the popular thing to do is rund 34 front and 36-38 in the rear, depending on weight and stuff being carried.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

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    Minnesota Nice! braddog's Avatar
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    Quote Originally Posted by DickOtten View Post
    I'm fond of my '95 R100RT; but according to all the info I have come across, it gets lousy mileage. Every source claims about 52-54 mpg at a steady 55mph or so. I am not an aggresive rider. Most would say timid. My route to rural riding is through about 5 miles of 45mph town streets (no stop and go) and then open country for a leisurely ride. My last ride reflects what I have been getting every time I check mileage. From a full tank I put on 161 miles and needed 4.3 gallons to top off. Less than 40 mpg. Bike has had very recent dealer service with no problems reported, and plugs show no sign of running rich. Any ideas. thanks - Dick Otten SW Florida
    The only time I've ever gotten over 40 MPG on either of the R100's I've owned is when I've been able to use non-ethanol gas and put on steady highway miles. My commuting has always resulted in less than 40 MPG, usually around 35 or 36.

    I've got no good technical information for you Dick, I'll leave that to the good folks on here who can give it to you accurately. However, I think there are many more folks who get far less than 50 MPG than those who do on their R100's.
    -----------------------------------------
    Brad D. - Member #105766
    '77 R100RS - Black Beauty (big pipe, baby!)
    '94 R1100RS - Sylvia

  4. #4
    James.A
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    I'd agree with Braddog. I have lately been commuting on a newly rehabilitated 1988 R100RS. While I HAVE been riding it in a spirited fashion, the mileage is running in the mid-30's in MPG. By contrast, My R75/5 gets well into the 40's regardless of riding style.

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    Registered User 88bmwjeff's Avatar
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    This subject has been discussed numerous times over the last five or so years. You may want to search for previous discussions. I have an 88 R100 RT. The bike averages in the mid-30's. The monoshock R100's with the 32mm carbs tend to get lower MPG than their predecessors. From what I've gathered on this forum and Boxerworks, is that mid-30's seems to be typical for late model R100's.

    On a side note: Bing recommends changing the idle jet, main jet, and needle jet. They claim the bikes were jetted lean for emissions. When I got the bike, I rejetted the carbs to Bing's recommendations. I have since jetted them back to stock, but I haven't put enough miles on it to see if it makes a difference.

    Edit: as for ideas...stop worrying about MPG, enjoy riding the bike, and ride it like you stole it.
    Jeff in W.C.
    1988 R100 RT (the other woman)
    "I got my motorcycle jacket but I'm walking all the time." Joe Strummer

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    Registered User toooldtocare's Avatar
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    About what my three R100's got, 78 and 88 RS, and 95 RT.

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    Thanks for the info. I guess the 54 mpg came from some fantasy world, or all downhill riding.

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    I have noticed that my mpg has decreased ever since E 90 gas gas appeared on the market.

  9. #9
    Bluenoser
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    Quote Originally Posted by DickOtten View Post
    I'm fond of my '95 R100RT; but according to all the info I have come across, it gets lousy mileage. Every source claims about 52-54 mpg at a steady 55mph or so. I am not an aggresive rider. Most would say timid. My route to rural riding is through about 5 miles of 45mph town streets (no stop and go) and then open country for a leisurely ride. My last ride reflects what I have been getting every time I check mileage. From a full tank I put on 161 miles and needed 4.3 gallons to top off. Less than 40 mpg. Bike has had very recent dealer service with no problems reported, and plugs show no sign of running rich. Any ideas. thanks - Dick Otten SW Florida
    Mileage is a mugs game. All kinds of claims but in actual fact it varies greatly depending on the way you ride the bike. No 2 people are going to get the same mileage.

    If you want to find out the actual mileage, fill the tank to its maximum, set your trip meter to zero go for a 150-200 mile ride on the highway/intersate, stop fill up the tank to the same level and do the return trip,then fill it up again. That will give you a pretty good idea of what mileage you are actually getting.

    It's been my experience that you can see a 5 mpg difference just to wind/temp conditions, so if you are in the range of 40-45 you are doing fine.
    1971 R50/5 SWB with R75/6 drivetrain
    2013 DL650

  10. #10
    Registered User PAS's Avatar
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    My 81 r100RT has averaged between 44 and 46 in general. Gotten higher on occasion
    Bike has 164K on it and it has had the needles and needle jets changed on occasion. I even went to richer needle jets over stock years ago.

    It lives in flat Ohio

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    On my 475 miles ÔÇ£mountainÔÇØ camping trip this past weekend I averaged 38.4 mpg on my 37,000 mile 1994 R100RT. Gentle run up from Atlanta, then twisty low/mid-gear runs that included Cherohala Skyway (5,300 ft elev.) and Wayah Rd. type loops. Average was 40.2 mpg. Some more low/mid-gear twisties followed by a very brisk major highway run back to Atlanta dropped the overall consumption. Fairly typical results for me.
    Mark

    Current - 1974 TR5T : 1993 R100R : 1994 R100RT ~ Past - 11# 1970s BSA/Triumph Singles & Twins : 2# 1970s CZ 125s : 1# 1985 BMW R65 : 1# 1976 Moby X7

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