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Old 06-19-2011, 03:11 PM   #46
BrokenR80RT OP
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Quote:
Originally Posted by supershaft View Post
Have fun with it. I only hope you got out your lab coat and pipe out while making the graphs. Penny loafers with no socks? And a sharp haircut! Oh the horror!
Thanks for your input, Supershaft. Completely invaluable.
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Old 06-20-2011, 03:18 AM   #47
bush pilot
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My old r90s was pretty consistent about getting 47-49 mpg at reasonably sane speeds (65-70). Those slide carbs and the tall rear axle ratio were great.
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Old 06-20-2011, 06:00 AM   #48
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Originally Posted by bikerfish View Post
45+ on both my r100's, 78 /7 and a 93 r100r. I can squeeze 50 out of them if I want to.
+1... 45mpg usually... it will go way over that if I'm milking it along at 65 or less... My sweet spot is right at 69-70 mph, great mileage, smooth as glass...
Pretty fresh carbs rebuilt in in Dec 2010, carefully synched and tuned by Renner... 130,000 original miles, no engine rebuilds or "restorations".
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Carrizojim screwed with this post 06-20-2011 at 06:08 AM
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Old 06-20-2011, 06:33 AM   #49
Big John Sny
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I don't know how this affects your results, but the fuel here in Dallas and many other large metropolitan areas in the US has changed quite a bit in recent years. I am getting significantly lower fuel milage numbers in all of my vehicles. Any additives they add will add volume of fuel without adding energy (some of these additives are seasonal). The addition of ethanol adds less energy per equivilant volume of gasoline it is replacing.

I was getting a consistant 31mpg till I moved the needles back to the factory setting and started getting 35. I would really love to get 40, but my car that used to get 34 is now getting 30 and my minivan that was getting 25 is now getting 20 (both get slightly better when I get gas outside the metroplex), so I don't see that happening. I have used my wifes 250 ninja to go to work that should be getting 65 and I get just over 50, so maybe it is just me (although my wife says both cars get 2 mpg better when I drive them than when she does).
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Old 06-20-2011, 09:40 AM   #50
pit0rz
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84 R100RT (currently nekkid) - 36MPG spirited back road riding w/ VERY limited Interstate jaunts. VM38 Mikunis and K&N Filter in stock airbox and Epco pipes (kinda loud)
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Old 06-20-2011, 10:10 AM   #51
Rapid Dog
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'81 R100RS 40mm Bings, 9.5 psitons, Lufty pipes, dual-plugged

Saturday, 49.5mpg average. 164 miles of freeway, canyons, open road, slow rough stuff.
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Old 06-20-2011, 10:40 AM   #52
Bill Harris
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I check the gas mileage once or twice a year. Mileage has been typically in the 47-49 mpg range over the years. A bit lower with spirited/high speed riding, and a bit higher with a light throttle. I've not seen much change with the introduction of ethanol-laced fuel, although cold starts are most affected.

"YMMV"
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Old 06-20-2011, 12:29 PM   #53
BrokenR80RT OP
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Location: Michitucky
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Quote:
Originally Posted by Big John Sny View Post
I don't know how this affects your results, but the fuel here in Dallas and many other large metropolitan areas in the US has changed quite a bit in recent years. I am getting significantly lower fuel milage numbers in all of my vehicles. Any additives they add will add volume of fuel without adding energy (some of these additives are seasonal). The addition of ethanol adds less energy per equivilant volume of gasoline it is replacing.

I was getting a consistant 31mpg till I moved the needles back to the factory setting and started getting 35. I would really love to get 40, but my car that used to get 34 is now getting 30 and my minivan that was getting 25 is now getting 20 (both get slightly better when I get gas outside the metroplex), so I don't see that happening. I have used my wifes 250 ninja to go to work that should be getting 65 and I get just over 50, so maybe it is just me (although my wife says both cars get 2 mpg better when I drive them than when she does).
Next time you are filling up instigate that pump and let us know how much ethanol your fuel has. That is one bad additive which will scalp your fuel economy. Gallon for gallon, ethanol has about 25% less potential energy than straight gasoline.
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Old 06-20-2011, 02:11 PM   #54
bgoodsoil
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40
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Old 06-20-2011, 03:36 PM   #55
Uncle Pollo
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45/50 r80
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Old 06-20-2011, 04:52 PM   #56
Stagehand
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Quote:
Originally Posted by BrokenR80RT View Post
Next time you are filling up instigate that pump and let us know how much ethanol your fuel has. That is one bad additive which will scalp your fuel economy. Gallon for gallon, ethanol has about 25% less potential energy than straight gasoline.
its 10% here. :sad
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Old 06-20-2011, 06:02 PM   #57
Lornce
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Quote:
Originally Posted by Rapid Dog View Post
Saturday, 49.5mpg average. 164 miles of freeway, canyons, open road, slow rough stuff.
That's 60mpg imperial on a 2.91 equipped RS.

I knew short gears was the only thing holding me back.

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Old 06-20-2011, 06:09 PM   #58
Mr. B.
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I just did a 1700 mile trip on my 1978 R80/7. Based on my sloppy book keeping records I averaged about 47 mpg.
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Old 06-21-2011, 05:49 AM   #59
Gimmeslack
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G/S usually 2-up.
Varies according to type of riding I'm doing, but generally around mid-40's. Call it 45mpg.
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Old 06-21-2011, 06:36 AM   #60
Stagehand
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Good god. Do I just ride like an asshole? Sometimes I forget which crowd I'm hanging out with
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