1200 Interstate takes about 30 L per 100 km HELP !


Information and questions on GL1200 Goldwings (1984-1987)
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Bambosz
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Joined: Sat Nov 26, 2016 11:40 am
Location: Poland
Motorcycle: Goldwing 1200

1200 Interstate takes about 30 L per 100 km HELP !

Post by Bambosz »



Guys,

anyone know what can be "broken" ? My Goldwing takes about 30L / 100 km.
2 days ago I tank full,
go to home - 10 km
make 2 test rides - 2 x 14 km
Have half fuel tank O_O

And she is sneez after i let go my acceleration :/

My sprak plugs are light brown (weak coffee)
Only one was black, I change it with other one (other one is stil light brown - like weak cffee).

Yesterday i remove curberatore to check fuel values - they work (fuel goes only if i press "fuel float").


And question.
If goldwing has fuel pump, where is any "fuel return" pipe ?
In my goes only one pipe from fuel tank to pump and to curberators ... there is nothing "back / return" to fuel tank ...
Suppose if I've got pump there should be any "return" ?



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WingAdmin
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Re: 1200 Interstate takes about 30 L per 100 km HELP !

Post by WingAdmin »

Just as a translation for us Americans, he's getting about 7.8 mpg, so that's pretty horrendous.

The fuel system does not have a return circuit. The fuel pump pressurizes the fuel line, and the carburetor floats allow fuel flow in as required. There is no fuel flowing that is not required.

If you don't have a fuel leak somewhere, then you need to start looking at the carburetors.

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boonny
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Location: Canada
Motorcycle: 1984 Aspencade

Re: 1200 Interstate takes about 30 L per 100 km HELP !

Post by boonny »

Bambosz wrote:And she is sneez after i let go my acceleration :/
translation: backfire when throttle is released(I think) = air cut off valve. If he is leaking that much fuel there should be a very strong smell of fuel and possibly a small puddle when idling or fire. Also check air filter, look for mice or other pets. Sync carbs? Oh and possibly sticky brakes.

From Google translate, I don't know how accurate this is, hope this helps:

Tłumaczenie: rykoszetem, gdy przepustnica jest zwolniony (chyba) = powietrza odciąć zawór. Jeśli on jest nieszczelny, że dużo paliwa nie powinno być bardzo silny zapach paliwa i ewentualnie mała kałuża na biegu jałowym lub pożar. Należy również sprawdzić filtr powietrza, szukać myszy i innych zwierząt domowych. węglowodany Sync? No i ewentualnie lepkie hamulce. że to pomoże.

sportsfreaked
Posts: 370
Joined: Fri Mar 13, 2015 7:23 am
Location: Independence, MO
Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: 1200 Interstate takes about 30 L per 100 km HELP !

Post by sportsfreaked »

I agree to get that bad mileage it would have to be a big leak and you would think that would be noticeable either by visual or smell or both. If there is no leak anywhere then the problem I would think has to be in the carbs. I would do what has been suggested and make sure they are synced. To get that bad of mileage you would have to have a major leak right? I'm just thinking that bad carbs couldn't cause that bad of mileage by themselves could they?
Thanks to all who answer and help. It is greatly appreciated!
Ed

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julimike54
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Location: Euless, Texas
Motorcycle: 1986 GL1200A original owner
2016 HD FLTRU

Re: 1200 Interstate takes about 30 L per 100 km HELP !

Post by julimike54 »

If fuel isn't visibly leaking anywhere and he states all but one plug is proper color, or is it now all? You'd have to be dragging brakes or running in a low gear all the time to drop mileage that low. If one plug is black, it seems that one carb is outside its operating parameters and needs checking out, or the plug wire might be suspect. Drive it & check brake temperatures would be my first choice.
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Riding anything is a good day!
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G-Wiz
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Location: Bellingham, Washington
Motorcycle: 1984 GL1200 Standard

Re: 1200 Interstate takes about 30 L per 100 km HELP !

Post by G-Wiz »

Check your oil and make sure the level is not over full. Also smell it.



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