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Old 01-23-2014, 12:04 PM   #1
sigpe57 OP
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MPG in 1995 R100RT Classic

Just purchased the RT one month ago.

I am getting about 34mpg in Los Angeles 40 miles round trip freeway commute. Seems like kind of low.

Is is true later Monolever(including R100GS and R100R) has lower mpg than the twin-shock model? I can only fill up close to 4 gallons when the gas nozzle automatically pop off.

How many gallons are actually in the tank when the nozzle pop off?

I was getting 40mpg on my '99 r1100R and Honda '02 ST1100A. Of course they are all fuel-injected models.

sigpe57 screwed with this post 01-23-2014 at 04:24 PM
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Old 01-23-2014, 03:32 PM   #2
bmwrench
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There are a couple of reasons for poorer gas mileage on later bikes: They have a lower compression ratio and a shorter rear drive than the dual shock RTs.

The amount of fuel you can get in your tank is another story. You have the "shed" tank, which limits fuel filling with a flap at the top. This flap can be torn or cut out.
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Old 01-23-2014, 03:39 PM   #3
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Often worth rebuilding carbs and in doing so replacing the needle jets. The jet gets worn by the action of the needle so enriching the mixture.

Your local driving conditions may be relevant so giving a location in your profile is not a bad thing to do.
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Old 01-23-2014, 04:11 PM   #4
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My 91 R100mono does 22 km's on 1 liter loaded with camping gear doing 90 km/h.
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Old 01-23-2014, 04:16 PM   #5
sigpe57 OP
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The location is Los Angeles. 80+mph on the carpool lane. Can't go slower than that, you will get run over.

The RT can idle normally at 1100rpm. So my idle switch is not on, right?

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Old 01-23-2014, 05:07 PM   #6
danedg
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95 R100 mileage

Excellent question sigpe,

My '95 R100 Mystic still gets crap mileage (32-35) after a carb rebuild. 32mm CV's
I can only stuff 4 gals. US in the tank before it spits up all over everything...
I was gonna start a thread asking WHY? , but you beat me to it.

51 MPG is pretty impressive Prutser!
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Old 01-23-2014, 05:25 PM   #7
sigpe57 OP
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Quote:
Originally Posted by danedg View Post
Excellent question sigpe,

My '95 R100 Mystic still gets crap mileage (32-35) after a carb rebuild. 32mm CV's
I can only stuff 4 gals. US in the tank before it spits up all over everything...
I was gonna start a thread asking WHY? , but you beat me to it.

51 MPG is pretty impressive Prutser!

Do you mean you were getting better mileage before the rebuild? What was the mpg before the rebuild?

What did you get on the '74 Guzzi? Probably low 30's?
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Old 01-23-2014, 05:40 PM   #8
danedg
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The Guzzi was gettin' 48mpg before the tranny went kablukers.... that's all better now.

This pig always ran 32-36 mpg since day one.... and after the new kit went in



I know it can do better... but how?
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Old 01-23-2014, 06:10 PM   #9
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I figured I got between 30mpg (commuting and trying to keep up with my buddies S1000RR) and 45 (long cruise) last summer. First summer on a carb rebuild.
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Old 01-23-2014, 07:17 PM   #10
bmweuro
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You should be getting 45-50MPG. Replace the slide needles and slide needle jets. If your mileage does not go up I'll pay for the parts
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Old 01-23-2014, 08:16 PM   #11
shearboy2004
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Anywhere from high 30's to low 50's on my 88GS depending on throttle gusto !
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Old 01-23-2014, 08:28 PM   #12
ozmoses
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Quote:
Originally Posted by danedg View Post
The Guzzi was gettin' 48mpg before the tranny went kablukers.... that's all better now.

This pig always ran 32-36 mpg since day one.... and after the new kit went in

I know it can do better... but how?

A post from you without a /2 in it kinda throws me off!
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Old 01-24-2014, 12:15 PM   #13
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There is a difference between what mileage people actually get and what they claim. Some of my good friends do it all the time. Is it a sickness or just a positive outlook on life? Idiotnet mileage is magical. Mid thirties on any vintage RT is what I would call normal. Of course, most of any mileage story depends on how much throttle is applied but . . . . I have been listening to rally rats MPG stories for 40 years. Personally, my current bike is tuned to the tits and my mileage has varied between high teens and low forties depending on how I ride. My record of 42mpg on one fill up was on a road trip that I slowed down to almost legal speeds. I had to for too many tickets!
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Old 01-24-2014, 12:18 PM   #14
supershaft
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Quote:
Originally Posted by ozmoses View Post
A post from you without a /2 in it kinda throws me off!
All of my beemers have got AROUND the same mileage but my R69S was the worst of them all for sure! Overall, my R65LS the best.
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Old 01-24-2014, 12:31 PM   #15
Stan_R80/7
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I think the 80+ mph car pool lane speed is dropping MPG. My (older) R80/7 gets mid 40's around town to low 50's on the road with speeds ~ 60-70 mph. The Hannigan fairing helps some, but lower speeds help more. If I increase the speed to 80+, the MPG will drop. Try taking the bike on some lower speed (non-superslab) rides and see how the MPG changes.
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