Gas mileage on my 2000 wing


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hossross
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Location: Rochester, MI, USA
Motorcycle: 2000 Goldwing SE GL1500

Gas mileage on my 2000 wing

Post by hossross » Sat Oct 14, 2017 6:20 pm



I took a 4000 mile road trip with my friend who has a 1995 Wing Interstate and I have a 2000 SE. The 1995 consistently got 4 to 5 miles per gallon better than the 2000. Apart of the trip we rode with a 2006 Wing pulling a pop up camper trailer. He got the same mileage as my 2000 pulling nothing. The 1800 is FI and for reference only ? Why does the 2000 get significantly worse fuel mileage than the 1995? the 95 has a taller windshield by about 4 inches, but since we rode side by side at lots of different speeds, I doubt the lower speeds effected gas mileage either positive or negative, so a difference other than wind resistance. Both bikes have about 85000 miles on them. Does the 2000 have more emission equipment on it or any design changes that would lower the mileage? Any suggestions?

The only observational operation issue I noted was when using cruise control, the bike would slow to 2 mph below set speed and then accelerate aggressively, overshoot the set speed, coast down and repeat. This obviously is not the best way to get good mileage, but I also ran without cruise, and I am steady and smooth with the throttle, so cruise is not the only cause, although I don't know if the differential under those conditions was smaller or not, just don't remember, but compared gallons of fuel at fill each fill up and I always took more fuel.

Any suggestions on adjusting the cruise or where to look for vacumn leaks effecting the cruise consistency also? Thanks for reading my post



hossross
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Motorcycle: 2000 Goldwing SE GL1500

Cruise Control variance +/- 2mph from set

Post by hossross » Sat Oct 14, 2017 6:28 pm

The observed operation issue I noted was when using cruise control, the bike would slow to 2 mph below set speed and then accelerate aggressively, overshoot the set speed, coast down and repeat. This obviously is not the best way to get good mileage, but I also ran without cruise, and I am steady and smooth with the throttle, so cruise is not the only cause, although I don't know if the differential under those conditions was smaller or not, just don't remember, but compared gallons of fuel at fill each fill up and I always took more fuel.

Any suggestions on adjusting the cruise or where to look for vacumn leaks effecting the cruise consistency? I haven't ridden other wings, but I know automotive and the rate of acceleration is near zero, just modulates the carb air to maintain the set speed. Thanks for reading my post

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ct1500
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Re: Gas mileage on my 2000 wing

Post by ct1500 » Sat Oct 14, 2017 6:51 pm

It is likely someone previously over-tightened the cruise actuator cable to make up for the common lag in cruise activation, check and reset according to manual.

The I model is lighter in weight and what about the riders weight, big guys do not get top tier fuel mileage. Spark plugs and filters were last changed when on the machines? Very doubtful your 2000 has any decomposing vacuum lines but the no. 4 intake vacuum hose and fitting should be checked. At what RPM does your machine idle? You likely just need a general check over and fine tuning of carburetors. And what kind of alternator are you running and any added electrical loads?
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RBGERSON
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had every year from 75 to 83

Re: Gas mileage on my 2000 wing

Post by RBGERSON » Sat Oct 14, 2017 8:29 pm

your weight, tire pressure, bike's weight, throttle control..all effect mileage. of Course the engine efficiency..plugs, wires, = spark good or bad; carb settings and carb state clean dirty??? and what gear you run in and shift at what RPM's?? lots of variables. You should have changed bikes and run each others and see what effect that had???
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

hossross
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Motorcycle: 2000 Goldwing SE GL1500

Re: Gas mileage on my 2000 wing

Post by hossross » Sat Oct 14, 2017 8:45 pm

Thanks for the reply, good questions The question of weight would be about equal within 25 pounds anyway considering total of bike, rider, and camping/luggage of the 2 combo's so neutral effect of rolling weight. I even run slightly higher psi (+2) in my tires than he does. But the alternator is different, mine is a 95? amp aftermarket and his is OEM (55amp ?) and I have a few more lights SE verse Interstate, but all have the fog/driving lights so my alternator load would be higher and that does effect fuel economy. At road speed I'm guessing 1/2 mpg certainly not even a full 1 MPG.

idle speed is 800 and stabile but I have never balanced carbs after they were cleaned. Do you think that is significant? I do have the service manual now so will look up cruise control adjustment procedure, and see how much plastic has to come off.......... yep its a goldwing

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AZgl1800
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Re: Gas mileage on my 2000 wing

Post by AZgl1800 » Sat Oct 14, 2017 10:16 pm

different bike, an 1800.

mine gets 33 mpg on average, while a good friend who rides with me gets 43-45

mine is an 02, his is a 2010...
not supposed to be that much of a difference...

I just gave up worrying about it... every bike I have owned, two 1500s and now this 1800 all give me the same mpg, they all averaged out at 33 overall over a period of a 1,000 miles...

The following screenshot shows a single fillup at 37 mph, this was a ride thru the mountain twisties enjoying the fall colors, top speeds of 45-50 and tight turns down to 10 mph.



others who get great mileage I have found to have a riding style and country that requires them to stay at 50 mph or less 90% of the time.

I have always lived in the wide open spaces of the west with roads that are 100-150 miles long straight as a string... therefore, I am pushing the sonic barrier because I just can't sit still at 55 mph to save a dime's worth of fuel.



My windscreens have all been Tulsa Tall and 4 inches or more than OEM.
John
'02 Gl1800 Hot Rod Yellow,
daughter named her Big Bird :lol:
http://www.goldwingfacts.com

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MikeB
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Re: Gas mileage on my 2000 wing

Post by MikeB » Sat Oct 14, 2017 10:42 pm

My suggestion on gas mileage... put gas in it and ride. Too many wing owners fret over fuel mileage. Don't. If you get 180 miles on a tank and the low fuel light comes on, fill it up again and ride some more.

Don't worry about the gas mileage.

As to the cruise control, adjust it according to the manual.

Just my two cents worth.
MikeB
Tacoma, WA, USA

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Mag
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Re: Gas mileage on my 2000 wing

Post by Mag » Sun Oct 15, 2017 12:35 am

Yea....what he said (where is my lil "up arrow thingy"), lol.

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Corkster52
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Re: Gas mileage on my 2000 wing

Post by Corkster52 » Sun Oct 15, 2017 7:05 am

The biggest mpg improvement that I have seen on my 99 is keeping tire pressure around 2 pounds above maximum and keeping the rpms at or below 3000. If I don't I get between 32 and 34. If I do I get 38 to 42.

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seelyark1
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Re: Gas mileage on my 2000 wing

Post by seelyark1 » Sun Oct 15, 2017 3:53 pm

And what size tire are you running? Makes a change in RPM that affects fuel mileage too.
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topgun
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Re: Gas mileage on my 2000 wing

Post by topgun » Sun Oct 15, 2017 9:37 pm

for the cruise surge, if it never settles in, I would suggest replace speedo cable.
my 88 got to be a surger, replaced cable and was very steady after engagement. lubing old cable did not fix it.

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DenverWinger
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Re: Gas mileage on my 2000 wing

Post by DenverWinger » Sun Oct 15, 2017 11:40 pm

Also could be issues with vacuum leaks, or that hard-to-get-at cruise air filter....
They say 98% of all Hardleys ever made are still on the road..... The other 2% made it home. :lol:
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hossross
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Re: Gas mileage on my 2000 wing

Post by hossross » Sun Oct 15, 2017 11:47 pm

seelyark1 wrote:
Sun Oct 15, 2017 3:53 pm
And what size tire are you running? Makes a change in RPM that affects fuel mileage too.
[The tires are all Dunlaps Elite 3 stock sizes, my front is a radial and the 95 is biased belt, so revs should be same, and typically the rolling resistance on a radial is lower than biased, so the advantage to the 2000, but something else is apparently more significant. I said the 95 was an Interstate, that was error, obviously it is the Aspencade model. I can afford the gas, just trying to see what might be done to get it higher, as I think it is low. I did change the mufflers to a set of pre 97, just because my OEM's were badly perforated with rust, otherwise it is Stock (ie the mufflers, radial front tire, and the 90 Amp Alt)] Does any one know if the back pressure is different for the 98-00 oval outlet mufflers?

I don't understand the mufflers rusting so badly, the bike previously located in Manassas, Virginia including sitting in barn for 5 years. All I could figure, someone would occasionally start it, but never run or ride it long enough to get the exhaust system hot enough to evaporate the water. Everyone know that for every gallon of fuel burned, there is 1 gallon of H2O generated from chemical combustion. thanks for the thoughts

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WingAdmin
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Re: Gas mileage on my 2000 wing

Post by WingAdmin » Tue Oct 31, 2017 7:56 pm

hossross wrote:
Sat Oct 14, 2017 6:20 pm
The only observational operation issue I noted was when using cruise control, the bike would slow to 2 mph below set speed and then accelerate aggressively, overshoot the set speed, coast down and repeat. This obviously is not the best way to get good mileage, but I also ran without cruise, and I am steady and smooth with the throttle, so cruise is not the only cause, although I don't know if the differential under those conditions was smaller or not, just don't remember, but compared gallons of fuel at fill each fill up and I always took more fuel.
This is a pretty common problem with the GL1500, with an easy fix.

The problem is a loose cable. You set the cruise control, the bike engages it - but because of slack in the cable, the throttle doesn't open. The bike thinks; "wow, I must be going up a hill, better open the throttle much more to get up to speed!" and does that. Eventually the cable takes up slack, but now it's too much, and the bike overshoots its target speed, so the bike reduces throttle - but because of the loose cable, it ends up sagging below the set speed, so it speeds up...repeat over and over.

The other problem is: if you adjust the cable as specified by Honda in the service manual, it typically DOESN'T FIX IT.

Fortunately we have a How-To in our GL1500 DIY area that describes exactly how to fix it. It's a reasonably quick and easy fix: GL1500 Cruise Engage Lag

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satranger
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Re: Gas mileage on my 2000 wing

Post by satranger » Tue Oct 31, 2017 11:33 pm

AZgl1800, what are you using to track mileage? Is that a phone app you showed?

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Erdeniz Umman
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Re: Gas mileage on my 2000 wing

Post by Erdeniz Umman » Wed Nov 01, 2017 3:20 am

Here is the MPG graphic of my 2000 GL1500, between May 2016 and October 2017.

The MPG values in the red zone are due to the long idle running time during the works on headlight aiming and timing belt noise issue.
Attachments



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MikeB
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Re: Gas mileage on my 2000 wing

Post by MikeB » Wed Nov 01, 2017 12:14 pm

satranger wrote:
Tue Oct 31, 2017 11:33 pm
AZgl1800, what are you using to track mileage? Is that a phone app you showed?
It looks like the free application Fuelio: Gas log & costs APP available in Google Store.


MikeB
Tacoma, WA, USA

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AZgl1800
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Re: Gas mileage on my 2000 wing

Post by AZgl1800 » Thu Nov 02, 2017 2:20 pm

yes,

I am using a cellphone app called "Fuelio" and it is available in Android and iOS


I only use the fuel tracking feature, it offers a whole lot more, but I don't use any of the other stuff.


John
'02 Gl1800 Hot Rod Yellow,
daughter named her Big Bird :lol:
http://www.goldwingfacts.com

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