ADVrider

Go Back   ADVrider > Bikes > Old's Cool
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-27-2004, 10:49 AM   #1
summerinmaine OP
Hells Atheists MC
 
summerinmaine's Avatar
 
Joined: Sep 2003
Location: Humboldt Bay & San Felipe BCN
Oddometer: 42,918
Airhead GS - Gas Mileage?

Wondering what the normal range is for gas mileage on the big airhead. I've searched the archives, but results were inconclusive (too much oilhead data).

I recently bought a 92 R100GS with a PD tank, and was surprised to see that my range is lower than I expected. I recently ran a test on a one day ride (one up, parabellum screen, 47K miles on motor, 32mm Bings rebuilt less than 4K miles ago, system cases 1/2 full of tools/parts/clothes, mixed freeway and backroad, but virtually no stop and go), and got about 33mpg. I expected closer to 40mpg, but maybe I'm being unrealistic.

I haven't yet checked the odometer for accuracy, but will start there if I should be seeing better fuel economy. Assuming odo is okay and better mileage should be seen, where should I look next? Check plugs to see if carbies were jetted too rich in rebuild?

Thanks.
__________________
.

"My atheism, like that of Spinoza, is true piety towards the universe and denies only gods fashioned by men in their own image, to be servants of their human interests." George Santayana
summerinmaine is offline   Reply With Quote
Old 09-27-2004, 10:59 AM   #2
AnnieGS
Namasté, bitches!
 
Joined: Dec 2003
Oddometer: 29,547
I've got an '87 R80 -- the little blue OM says I should get 48 mpg, but 40 is grounded in reality.
AnnieGS is offline   Reply With Quote
Old 09-27-2004, 11:25 AM   #3
summerinmaine OP
Hells Atheists MC
 
summerinmaine's Avatar
 
Joined: Sep 2003
Location: Humboldt Bay & San Felipe BCN
Oddometer: 42,918
Quote:
Originally Posted by AnnieGS
I've got an '87 R80 -- the little blue OM says I should get 48 mpg, but 40 is grounded in reality.
Thanks Annie.
__________________
.

"My atheism, like that of Spinoza, is true piety towards the universe and denies only gods fashioned by men in their own image, to be servants of their human interests." George Santayana
summerinmaine is offline   Reply With Quote
Old 09-27-2004, 11:42 AM   #4
Jabba
"HOLD THE LIGHT!!!"
 
Jabba's Avatar
 
Joined: Nov 2002
Location: Just east of the Pine Beatle- Evergreen, CO
Oddometer: 12,550
Mine used to get 38 to 42 mpg- depending on flogation level~ shoot a PM to Gringo- he tracks his mileage pretty religiously. '92 PD
__________________
"Everybody loves cunnilingus!" Chacifer

"The road to paradise is paradise" Jacques Yves Cousteau
Jabba is offline   Reply With Quote
Old 09-27-2004, 12:20 PM   #5
summerinmaine OP
Hells Atheists MC
 
summerinmaine's Avatar
 
Joined: Sep 2003
Location: Humboldt Bay & San Felipe BCN
Oddometer: 42,918
Quote:
Originally Posted by Jabba
shoot a PM to Gringo- he tracks his mileage pretty religiously. '92 PD
Done. Thanks
__________________
.

"My atheism, like that of Spinoza, is true piety towards the universe and denies only gods fashioned by men in their own image, to be servants of their human interests." George Santayana
summerinmaine is offline   Reply With Quote
Old 09-27-2004, 12:38 PM   #6
dragoon
I'm the REAL Dingo Joe
 
dragoon's Avatar
 
Joined: Feb 2003
Location: Frazeysburg, OH
Oddometer: 23,055
'88 GS w/PD tank and 105,000. Got about 36mph fully loaded (the bike was) (I was when we hit camp ) on my trip to Ouray this summer.
Carbs were just rebuilt before the trip. Mileage sucked big time before that
__________________
Everyone should be so lucky as to be able to ride a motorbike through the Himalayas.
- Misery Goat


daveology rule #143 - never ever pass up a chance to hear a band that has a stand up bass -Mutineer
dragoon is offline   Reply With Quote
Old 09-27-2004, 12:40 PM   #7
Steverino
Arrogant Horse's Ass #1
 
Joined: Nov 2001
Oddometer: 36,666
Quote:
Originally Posted by dragoon
'88 GS w/PD tank and 105,000. Got about 36mph....
Damn, must have been hell going all that way at 36mph...how long did the trip take? Three weeks?
Steverino is offline   Reply With Quote
Old 09-27-2004, 12:48 PM   #8
dragoon
I'm the REAL Dingo Joe
 
dragoon's Avatar
 
Joined: Feb 2003
Location: Frazeysburg, OH
Oddometer: 23,055
Quote:
Originally Posted by Steverino
Damn, must have been hell going all that way at 36mph...how long did the trip take? Three weeks?
You should've seen me when I had that sucker going 48mph












jackass
__________________
Everyone should be so lucky as to be able to ride a motorbike through the Himalayas.
- Misery Goat


daveology rule #143 - never ever pass up a chance to hear a band that has a stand up bass -Mutineer
dragoon is offline   Reply With Quote
Old 09-27-2004, 01:10 PM   #9
Steverino
Arrogant Horse's Ass #1
 
Joined: Nov 2001
Oddometer: 36,666
Quote:
Originally Posted by dragoon
jackass
That's me......
Steverino is offline   Reply With Quote
Old 09-27-2004, 01:22 PM   #10
Flash
Sand Boxer
 
Flash's Avatar
 
Joined: Dec 2001
Location: Sarasota, FL
Oddometer: 3,163
36 mph after the carb rebuild?

78 R100 gets 38-40 mpg. If I get real feather-fisted I can get 43 mpg, but with 6.3 gallons, why bother.
__________________
04 K1200GT
IBA # 12323
Flash is offline   Reply With Quote
Old 09-27-2004, 01:22 PM   #11
Eurobiker
Vintage Cat Herder
 
Eurobiker's Avatar
 
Joined: Apr 2002
Location: Albuquerque, NM
Oddometer: 5,914
My 92 GS usually gets 35-36 mpg. Due to the taller gearing, the street bikes do better, IMHO. My 76 R90/6 consistantly would get 41-42 mpg.
__________________
Mark

If I agreed with you, we'd both be wrong.



Eurobiker is offline   Reply With Quote
Old 09-27-2004, 01:58 PM   #12
summerinmaine OP
Hells Atheists MC
 
summerinmaine's Avatar
 
Joined: Sep 2003
Location: Humboldt Bay & San Felipe BCN
Oddometer: 42,918
Quote:
Originally Posted by Eurobiker
My 92 GS usually gets 35-36 mpg. Due to the taller gearing, the street bikes do better, IMHO. My 76 R90/6 consistantly would get 41-42 mpg.
I guess that's another data point (or two) that I forgot. I'm usually travelling with the motor in the 5500-6300rpm rev range.

So far, it sound like I'm in the low end, but not so much so that a fuel leak should be suspected.
__________________
.

"My atheism, like that of Spinoza, is true piety towards the universe and denies only gods fashioned by men in their own image, to be servants of their human interests." George Santayana
summerinmaine is offline   Reply With Quote
Old 09-27-2004, 02:08 PM   #13
Eurobiker
Vintage Cat Herder
 
Eurobiker's Avatar
 
Joined: Apr 2002
Location: Albuquerque, NM
Oddometer: 5,914
FWIW, at 5K rpm, I'm traveling 77 mph, according to the GPS. No load, other than my arse. I don't know if the PD's were geared lower than the stock GS's
__________________
Mark

If I agreed with you, we'd both be wrong.



Eurobiker is offline   Reply With Quote
Old 09-27-2004, 02:26 PM   #14
Jabba
"HOLD THE LIGHT!!!"
 
Jabba's Avatar
 
Joined: Nov 2002
Location: Just east of the Pine Beatle- Evergreen, CO
Oddometer: 12,550
Nope- same gearing.
__________________
"Everybody loves cunnilingus!" Chacifer

"The road to paradise is paradise" Jacques Yves Cousteau
Jabba is offline   Reply With Quote
Old 09-27-2004, 02:59 PM   #15
Stephen
Beastly Adventurer
 
Stephen's Avatar
 
Joined: Feb 2002
Location: Austin, Texas, USA
Oddometer: 3,182
r75/5: 40 mpg

77 R100RS: 40 mpg, long-term average. Don't know why I kept so many records on for that bike. On a 5000-mile trip, high was 42 mpg, low was 38 mpg, trip avg 40.000 mpg. Hot, cold, up, down, fast, slow, whatever. Tended to run it at higher rpms.

88 R100GS: 40 mpg, regardless of how I rode it. Usually lived above 4000 rpm. Most often, well above 4000 rpm.

Looks like BMW was designing to a spec, don't it?
Stephen is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 09:49 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014