Fuel pump bypass
Moderators: CYBORG, Oldewing, robin1731, Forum Moderators
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Fuel pump bypass
download/file.php?mode=view&id=77359
Cheap easy mod to prime the carbs after drain down or when your wing has been stood for a while. Just open the fuel cock open the valve wait a minute close the bypass valve then start her up. Ideal for early wings with mechanical fuel pumps.
Saves all that cranking.
Cheap easy mod to prime the carbs after drain down or when your wing has been stood for a while. Just open the fuel cock open the valve wait a minute close the bypass valve then start her up. Ideal for early wings with mechanical fuel pumps.
Saves all that cranking.
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- ericheath
- Honored Life Member
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Re: Fuel pump bypass
Saves the starter
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
- Fred Camper
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Re: Fuel pump bypass
I like it. Thank you for posting. Will you be selling the kit? LOL.
Proud member of the NGW Cartel (Rochester MI)
1977 GL1000 BADDOG (April 2012 BOTM)
1976 LTD - '993 LTD...and so it begins'
You should remember that it's peace of mind you're after and not just fixing the machine. R.Pirsig
1977 GL1000 BADDOG (April 2012 BOTM)
1976 LTD - '993 LTD...and so it begins'
You should remember that it's peace of mind you're after and not just fixing the machine. R.Pirsig
- 05c50
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Re: Fuel pump bypass
If I remember correctly, Pistol Pete posted something like that a few years ago and he was selling them. I'm old so don't quote me on that.
......Paul
......Paul
I prefer to ride my wing naked,thank you
My wife asked me "How many bikes does one man need?" My answer "Uhhh.just one more"
75 Goldwing
78 Goldwing
77 CB750a
77 CB550f
80 CB650c
05 Boule C50
My wife asked me "How many bikes does one man need?" My answer "Uhhh.just one more"
75 Goldwing
78 Goldwing
77 CB750a
77 CB550f
80 CB650c
05 Boule C50
- 05c50
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Re: Fuel pump bypass
Maybe it was Randall.
......Paul
......Paul
Last edited by 05c50 on Fri Feb 14, 2020 5:49 pm, edited 1 time in total.
I prefer to ride my wing naked,thank you
My wife asked me "How many bikes does one man need?" My answer "Uhhh.just one more"
75 Goldwing
78 Goldwing
77 CB750a
77 CB550f
80 CB650c
05 Boule C50
My wife asked me "How many bikes does one man need?" My answer "Uhhh.just one more"
75 Goldwing
78 Goldwing
77 CB750a
77 CB550f
80 CB650c
05 Boule C50
- CYBORG
- Moderator
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- Location: Muskegon mich
Re: Fuel pump bypass
I use an electric fuel pump..... does the same thing Less moving parts
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200
1977 custom with 1200 engine
1985 gl1200
- robin1731
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- Location: Decatur, Indiana
Re: Fuel pump bypass
And you don't have to remember to move a lever one way then the other.CYBORG wrote:I use an electric fuel pump..... does the same thing Less moving parts
.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
- Cakey
- Silver Member
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- Location: Darwin Australia
Re: Fuel pump bypass
Great idea. Any pics of one set up on the bike? It’s one thing that annoys me as I religiously run the bowls dry now after getting sick of pulling the carbs off and cleaning when it sat to long and I had not run it dry.
1975 Gl1000
- robin1731
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Re: Fuel pump bypass
One thing to remember. The tank would need to be at least 1/2 full for this to work.
.
.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
- Cakey
- Silver Member
- Posts: 583
- Joined: Sun Dec 30, 2012 5:58 am
- Location: Darwin Australia
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- Lead Member
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Re: Fuel pump bypass
I find as long as the gas cap hasn't been moved there is enough natural pressure in the tank to push the fuel through even when its quite low.robin1731 wrote:One thing to remember. The tank would need to be at least 1/2 full for this to work.
.
- robin1731
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Re: Fuel pump bypass
Perhaps when outside temp is high. But in cooler weather the pressure will go down and won't be as successful at feeding the carbs which are then above the fuel level.Tom61 wrote:I find as long as the gas cap hasn't been moved there is enough natural pressure in the tank to push the fuel through even when its quite low.robin1731 wrote:One thing to remember. The tank would need to be at least 1/2 full for this to work.
.
.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
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- Titanium Member
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- Location: Texas
Re: Fuel pump bypass
I was thinking along those lines too, isn't the whole idea of the pump because in general there is no height, gravitational pressure difference, between the gas tank and the float bowl(s)?
- desertrefugee
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Re: Fuel pump bypass
Man, do I like this idea. However, like cyborg, my 1000 also employs an electric fuel pump but the vast majority of them don’t. This is a great idea.
- Life is not about waiting for the storms to pass. It's about learning to ride in the rain.
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Re: Fuel pump bypass
i gotta admit, I'm not as totally convinced as you are.desertrefugee wrote:Man, do I like this idea. However, like cyborg, my 1000 also employs an electric fuel pump but the vast majority of them don’t. This is a great idea.
So you've either got to put the bike up with a full tank of gas for long enough for the bowl(s) to go dry. Or go down the road, get gas and fill it up, just to save a few seconds of starter motor use? Hmmmm!
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