fuel consumption


Information and questions on GL1100 Goldwings (1980-1983)
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fynespirits
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Joined: Mon Aug 31, 2015 7:32 pm
Location: merseyside uk
Motorcycle: Gl 1100 a 1982

fuel consumption

Postby fynespirits » Wed Jan 27, 2016 10:58 am



This has probably been asked before , but what kind of mpg are people getting from their 1100 s
only asking as I have rebuilt my carbs and I am unimpressed at my mpg !
I do occasionally give the throttle a good twist :D
so I am no slow rider shall we say , but I get a lot better millage from my 600 sports bike and that gets
it's neck rung all the time ! :mrgreen:
cheers

forgot to add , 1982 , 1100 aspencade all original !


The wrong side of 30 yrs old ,
over 600 lbs , and she can still turn heads with her looks !! :lol:

indianakid
Posts: 125
Joined: Sun Sep 26, 2010 5:28 pm
Location: long beach, ca
Motorcycle: 83 GL1100 I

Re: fuel consumption

Postby indianakid » Wed Jan 27, 2016 11:11 am

"I have rebuilt my carbs and I am unimpressed at my mpg !"


What is your mpg ????? That information would be a nice way to start off this thread.

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fynespirits
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Re: fuel consumption

Postby fynespirits » Wed Jan 27, 2016 3:18 pm

Maybe a 100 miles to the tank !
Seems rather thirsty ?
but maybe it is about right ?
The wrong side of 30 yrs old ,
over 600 lbs , and she can still turn heads with her looks !! :lol:

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RoadRogue
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Location: Castlegar BC, Canada
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Re: fuel consumption

Postby RoadRogue » Wed Jan 27, 2016 8:57 pm

Should be more like 200 spirited miles to the tank 8-)
Ride safe, Todd
Over night campers welcome

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fynespirits
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Re: fuel consumption

Postby fynespirits » Thu Jan 28, 2016 6:42 am

That would be awesome , :o
time to get checking the bike over I think !
The wrong side of 30 yrs old ,
over 600 lbs , and she can still turn heads with her looks !! :lol:

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dingdong
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Re: fuel consumption

Postby dingdong » Thu Jan 28, 2016 8:52 am

But guys, I just rebuilt the carbs. Famous last words. You would be surprised how many times the carbs have to be re-rebuilt. These carbs require precise rebuilding techniques and are unforgiving to shortcuts and many aftermarket parts. Yeah you should be getting close to 200 miles per tank under normal riding conditions. Good luck!
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

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fynespirits
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Location: merseyside uk
Motorcycle: Gl 1100 a 1982

Re: fuel consumption

Postby fynespirits » Thu Jan 28, 2016 12:40 pm

The problem here in England , is that there are not many specialists that are reasonably priced !
quoted £530 sterling to rebuild but only bench synchronised ! That equals $763.20 !!!
not bike specific ! So being a car mechanic and having stripped and rebuilt hundreds of carbs on cars and some bikes
I figured I would do them myself !
the bike had rust deposits in the tank after the previous owner used an old steel jerry can to put fuel in !
which caused the jets to become partially blocked and almost stall on Idle .
bike now runs sweet , loads of grunt and smooth power .
Just extremely thirsty ?
but all part of the leaning curve , will get it right and at least it is back on the road :D
The wrong side of 30 yrs old ,
over 600 lbs , and she can still turn heads with her looks !! :lol:

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Johnyy Smoke
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Location: Se Minnesota
Motorcycle: 1980 GL1100
Vetter. "Its like Deja Vu all over again".

Re: fuel consumption

Postby Johnyy Smoke » Fri Jan 29, 2016 4:41 pm

dingdong wrote:But guys, I just rebuilt the carbs. Famous last words. You would be surprised how many times the carbs have to be re-rebuilt. These carbs require precise rebuilding techniques and are unforgiving to shortcuts and many aftermarket parts. Yeah you should be getting close to 200 miles per tank under normal riding conditions. Good luck!

It is somewhat tedious and requires a bit of attention, but it is not rocket science. 90% of carb rebuild is cleaning, and cleaning, and cleaning.
Randakks web page has lots of info on this subject. You have experience in rebuilding carbs, so you should know why this is going on.
With my rebuilt carbs (I did myself) I get about 41 mpg average.
Quality kits are expensive, but I do not think you have to buy the best of the best. K&S have carb kits, for each carb, these will suffice.
I have always wondered why ,on a website such as this, that is dedicated to saving money by doing it yourself, that so many members insist on OEM (the MOST expensive way to go). Not all aftermarket gaskets are junk. One would think that after almost 40 years that these bikes have been in existence, someone would produce a suitable replacement gasket set, o-ring, etc. And they have. I am not saying all aftermarket is acceptable, not by a long shot, however a little research will provide info on what works and what does not. Off hand, I would think that Idle jets settings would be a consideration.
Check your spark plugs, send us a pic or two. You can learn a lot from the lowly spark plug :ugeek:. Narrow minded thinking can cost you money. Regards, Johnny

bobbybiscuit
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Re: fuel consumption

Postby bobbybiscuit » Sat Jan 30, 2016 12:30 pm

On a 120 mile run from Plymouth to Bristol doing 60 to 70mph i got about 45mpg. On A class roads close to 42-43mpg (UK gallon)

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fynespirits
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Re: fuel consumption

Postby fynespirits » Sat Jan 30, 2016 6:02 pm

Cheers bobbybiscuit ,
thats a lot better than I expected to be honest !
seems like everyone is getting double what I am getting !
with the fuel I am using , she must spit flames on full throttle :twisted: :twisted: :twisted:
strange as plugs apear to be fine , no fuel in oil , no obvious fuel leaks ? :?:
will just leave alone for now while running smooth , then invest in a Randakk seal kit and get new jets and float valves !
then give the carbs a refurbishment rather than just a re-build .
The wrong side of 30 yrs old ,
over 600 lbs , and she can still turn heads with her looks !! :lol:

bobbybiscuit
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Re: fuel consumption

Postby bobbybiscuit » Sun Jan 31, 2016 5:09 am

You will find that if you accelerate hard and go over 70 mph fuel consumption will increase substantially. Don't forget these bikes are old not designed for speed . When set up right they will go on and on and on at cruising speed. The large windscreen and strong winds here in UK don't help with fuel consumption.

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fynespirits
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Re: fuel consumption

Postby fynespirits » Sun Jan 31, 2016 6:56 am

I try to stick to about 60 ish to be honest but with my speedo being a bit out of true , its possible
I am doing 70 .
Randakks appears to be closed at the minute so I will leave it be for now and just enjoy the ride ,
at least it goes better than it did when I first bought it ,
could manage 1 -2 miles then cut out , due to jets being blocked !
Infact they where so bad I am surprised it started never mind rode a mile or two !!!
all four main jets totally blocked and all four idle jets partially blocked !!
probably only running lean on idle hence hard to start , and probably rode on the acceleration pumps !
Or just the fumes that made it through :mrgreen:
The wrong side of 30 yrs old ,
over 600 lbs , and she can still turn heads with her looks !! :lol:

bobbybiscuit
Posts: 127
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Re: fuel consumption

Postby bobbybiscuit » Sun Jan 31, 2016 8:12 am

My Aspencade is off the road at the moment and has been since last July. Lost heart in it because back brake kept seizing even after rebuilds. Front brakes kept losing brake fluid and I cant see any leaks. So rebuild required there. Going to put in braided pipes.

My carbs are ropey. Starts but "fits and farts" until engine warm then flat spot when opening or revs under 2500rpm - above that its a dream to ride BUT I have to have a warm engine first. Bought a replacement set of carbs off ebay from a running bike and I chap I know through my son buying a bike off him is going to strip the carbs and clean them . Will buy any replacements parts then, I know that the existing carbs draw in air through the body when cold and do to a certain extent when warm.
I have also bought airline quality rubber boots for the intakes and have yet to buy new clamps. So when spring comes there is lots of work to be done ( I have no garage to work in). Buying parts each month as and when I can afford it. Some new and some good quality used parts.

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Johnyy Smoke
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Re: fuel consumption

Postby Johnyy Smoke » Sun Jan 31, 2016 8:34 am

"Fits and farts". It does sound like your carbs may be out of "sync". Have you done this yet? Regards, Johnny

bobbybiscuit
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Re: fuel consumption

Postby bobbybiscuit » Sun Jan 31, 2016 8:45 am

Yes several times. Mind its really hard to adjust, pushing down on the screws lightly and locking the nut without knocking out the setting. The carbs draw air around the body, have proved that by spraying a wd type light oil on the body. Bear in mind I am not a mechanic and rely a lot on people to help me (at a cost). I have taken back brakes to pieces now I cant remember what goes where lol. Took of the master cylinder aswell and again I know where it goes bit dont know how it connects. I know there are manuals etc on here so I will be referring to them especially those with pics.

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fynespirits
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Re: fuel consumption

Postby fynespirits » Sun Jan 31, 2016 1:17 pm

Read that you have 2 calipers ?
my aspencade is a 1982 and has a twin piston caliper on the rear !
when rebuilding the caliper it would be worth using rubber grease on the seals to make sure they do not get pinched
while putting the pistons back in !
as for you carbs , it would be worth getting a small /shallow glass jar , (like those you buy cockles or mussels in) but make sure it is CLEAN AND DRY first . And placing under each carb one at a time and draining the bowls individually , the reason I say glass is it will allow you to check for water and other contaminants that MAY be in your carbs .
You will see the drain screws at the bottom of the bowls just behind the intake pipes .
It helps if you use a long screwdriver , rather than trying to fiddle with a stubby one behind the intake pipe !
remove the drain screws totally , don't worry about dropping them they should drop in the jar anyway !
also helps to place a rag under the jar incase you spill a bit of fuel !!
If you have difficulty replacing the screws just put grease on the slot head of the screw and it should stick to the screw driver , just take it slow when starting the threads back off so as not to cross-thread them !
the fuel that is now in the jar needs to settle for 60 seconds or so and might reveal the internal conditions of your carbs !
Obviously this is no substitute for a complete strip and refurbishment but it will at least show if there is heavy contamination
of the carbs. If all is clear you might just get away with replacing the intakes , one at a time without the need to strip the carbs at all !
as a temporary fix and I do mean TEMPORARY , you could bind insulation tape around the rubber sections overlapping the alloy to help seal any vacuum leaks . This would go some way to allowing balancing of your carbs .
hope this helps , shame you are so far away or I would offer you a hand !
The wrong side of 30 yrs old ,
over 600 lbs , and she can still turn heads with her looks !! :lol:

bobbybiscuit
Posts: 127
Joined: Fri Feb 28, 2014 3:27 pm
Location: Plymouth, England, United Kingdom
Motorcycle: 1982 GL1100A Aspencade
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Re: fuel consumption

Postby bobbybiscuit » Sun Jan 31, 2016 2:18 pm

Thanks for the guidance.

The two calipers was a typo should have read "two caliper pistons".

Re the carb issue - its off the road until spring when the front and rear brakes will be reassembled. In lots of pieces at the moment. Will look at carb afterwards. I do have a replacement set of carbs that I bought from a running GL1100. So hopefully the new carbs are in better shape than the old. I will buy new seals for the carb at the end of February.

Re the inlet rubbers - have bought aeroplane quality rubber from a company in the States which will eliminate some of the problems. Th existing carbs are fine when engine warmed up and running at cruise speed. Its start up and accelerating slowly on around town say when it can be problematic. Carbs were professionally cleaned in October 2013 and have only done about 2000 since then if that.

Pity you are not closer I could learn something from you.




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