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Old 10-21-2012, 03:33 PM   #16
some_guy
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Location: NoVa
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I figure 40-45mpg most of the time on my 95 R100RT (without the fairings). I run premium from BP or Shell. Combination of stop and go (commuting in NoVA) and highway traffic.
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Old 10-21-2012, 04:01 PM   #17
john112deere
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Location: central VT
Oddometer: 39
I'm a little obsessive about tracking MPG in my pickup.

The bike...not so much. Fill it to the nearest whole-dollar amount of gas that'll fit in the tank, ride 'til I hit reserve, repeat. Rarely look at the odometer or number of gallons, never write anything down.

Every time I've roughed out a number, though, it's been 42.x mpg. That's usually on longer rides with the windscreen and side cases on, highway or backroads, but it doesn't seem to matter if it's all local riding without 'em, either.

EDIT: '86 R80, about 90k miles. More or less all stock and original as far as I know.
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Old 10-21-2012, 04:34 PM   #18
craydds
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Location: Las Cruces, NM
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'75 R90S... 45 mpg. Mostly stock motor - stock heads and cam, lightened flywheel, bored cylinders and oversized pistons, lightened wrist pins. Boyer ignition, stock Dellortos with needles dropped down one notch. I am going to try smaller main jets, got two smaller sizes to test (recommended by Steve from Bevel Heaven). I ride at 4500 ft. elevation and above - up to 11,000 ft. Hope to get a bit better mileage, but it is not all that important - PERFORMANCE is the key.
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Old 10-21-2012, 04:40 PM   #19
SRanger331
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Location: NW Ohio
Oddometer: 175
Stock 73 r60 22k miles. Usually 44-46 mpg us, one tank best of 50.
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Old 10-21-2012, 05:48 PM   #20
Wirespokes
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Location: Jackson's Bottom Oregon
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I think the heavier you are, the worse the mileage.

The 86 G/S does the worst with 38-44. The only real mod is 1,000 jugs. It might get 46 on the highway, but don't recall as it's been quite a few years since I've travelled very far on it.

The 77S - RS fairing, 1050 kit and dual plugged tends to get 48 to 50mpg. When I first got it, the jetting was way too rich and timing was off quite a bit. Riding it home from the Bay Area, it got something like 38 - 44 mpg. It's much much peppier now, but I'm betting there's some heavy carbon build up in the combustion chamber that promotes pinging under heavy acceleration in hot weather.

The 83 850cc R65LS with modified heads and 34 Mikunis is the real surprise. No matter how I ride it, the mileage works out to 49-51 mpg. Like the 77, it had comparable mileage when it first showed up here.

Most of my bikes have gotten 45 to 50 mpg. Forty seven or forty eight was really common with my 1980 R100T with an RS fairing, no mods.

My first beemer - 76 R90 got 51 at one fill up, but generally got in the high forties. I tend to not accelerate hard unless passing or for safety reasons.
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Old 10-21-2012, 06:17 PM   #21
_cy_
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riding normal, accelerating hard as R80G/S can go gets 40-42mpg.

riding like a grandma, 52mpg is the best I've gotten.
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Old 10-21-2012, 06:47 PM   #22
garyinalt
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My 1993 R100R gets around 45 mpg and my 1978 R100 USED to get 50 mpg until E10 came about. Now it gets around 45 mpg.

I don't get it. They take away 10% of the gas, replace it with alcohol, and you get 10% worse gas milege. So you have to buy just as much gas to go as far . Where is the savings?
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Old 10-21-2012, 08:06 PM   #23
supershaft
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Quote:
Originally Posted by garyinalt View Post
My 1993 R100R gets around 45 mpg and my 1978 R100 USED to get 50 mpg until E10 came about. Now it gets around 45 mpg.

I don't get it. They take away 10% of the gas, replace it with alcohol, and you get 10% worse gas milege. So you have to buy just as much gas to go as far . Where is the savings?


In the alcohol industries bank accounts.
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Old 10-22-2012, 04:23 AM   #24
boxerboy81
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Location: Melbourne, Oz
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I get about 15kpl which is 57kpg or 35.5 mpg.

Needles and needle jet changes?

How much has renewing these improved anyones mpg?

How often should they be changed?
Mine have done 80K kms.
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Old 10-22-2012, 04:57 AM   #25
England-Kev
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I get around 46mpg from my R80St fully loaded for camping but our gallons are different to the US version.. and our miles have bends in them too
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Old 10-22-2012, 06:27 AM   #26
Bill Harris
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Location: backwoods Alabama
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I got a solid and consistent 48 mpg when the bike had "low test" base gsakets and the mileage increased to around 50 mpg with the "normal" base gaskets (Compression Ratio went from 8.5 to 9.6:1).

It'll be interesting to see what the highway mileage goes to-- I recently changed over from a Vetter barndoor fairing to a Hannigan bullet fairing.

--Bill
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Old 10-22-2012, 07:30 AM   #27
naginalf
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Location: Madison, WI
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Quote:
Originally Posted by garyinalt View Post
I don't get it. They take away 10% of the gas, replace it with alcohol, and you get 10% worse gas milege. So you have to buy just as much gas to go as far . Where is the savings?
Quote:
Originally Posted by supershaft View Post
In the alcohol industries bank accounts.
And lets not forget that you're paying for it twice. Your tax dollars go to paying the farmer a subsidy for already overpriced corn that the farmer would otherwise lose money growing.

I get 36mpg on my PD, but then I weigh about 275lbs and I'm 6'2, so there's no lack of drag factor there. 32mm bings btw on a fresh valve adjustment, timing seems fine, and the carbs are balanced well. I'm 99% sure it's stock jetting but I'd have to check.
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naginalf screwed with this post 10-22-2012 at 09:19 AM
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Old 10-22-2012, 08:25 AM   #28
sithndman
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Location: Too far south of ATL
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Anywhere from 35-40 mpg, depending on how heavy I'm on the throttle. '78 R80/7 stock.
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Old 10-22-2012, 08:47 AM   #29
Uncle Pollo
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Location: Albuquerque, Neue Messico
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Quote:
Originally Posted by boxerboy81 View Post
I get about 15kpl which is 57kpg or 35.5 mpg.

Needles and needle jet changes?

How much has renewing these improved anyones mpg?

How often should they be changed?
Mine have done 80K kms.
What carb and jetting?
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Old 10-22-2012, 10:28 AM   #30
Mark Manley
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Location: Back home in the UK
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Quote:
Originally Posted by boxerboy81 View Post
I get about 15kpl which is 57kpg or 35.5 mpg.

Needles and needle jet changes?

How much has renewing these improved anyones mpg?

How often should they be changed? Mine have done 80K kms.
I renew the needle, needle jet and main jets every 50,000 miles which is 80,000 km so about now for you. I get an improvement of between 2 and 4 mpg.
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