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gs550l choke
hi all so after my dad pulled the carbs off again to check specifically ino 4 he cant see nothing wrong pulled out all the jets etc cleaned again .ive had a look and just wondering how the choke works beacuse one thing that was happening was when started no throttle no choke bike idled ok but if i put choke on revs increased but when shut choke off revs hanged then if i turned engine off and restarted revs were normal again.i see the little hole the choke uncovers under the diaphram when choke is on does it pull air through this hole which increases pressure under the diaphram lifting slide up for choke! cheers paulTags: None
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You can’t just look at these carbs and decide “they’re clean”. There are tiny passages in carb body that feed/control the idle and low speed circuits . Once clogged, bike will start but will behave badly.
3087F1A4-B541-40DA-91C7-027AECCFF340.jpg
the little hole under diaphragm feeds air to choke plunger..making a mixture ....it doesn’t do any lifting cuz at startup and low speed diaphragm isn’t functioning. However if “choke” is left on ,this excess mixture will cause high idleLast edited by tom203; 01-13-2021, 03:29 PM.1981 gs650L
"We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin
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Originally posted by bean1969 View Posthi all so after my dad pulled the carbs off again to check specifically ino 4 he cant see nothing wrong pulled out all the jets etc cleaned again .ive had a look and just wondering how the choke works beacuse one thing that was happening was when started no throttle no choke bike idled ok but if i put choke on revs increased but when shut choke off revs hanged then if i turned engine off and restarted revs were normal again.i see the little hole the choke uncovers under the diaphram when choke is on does it pull air through this hole which increases pressure under the diaphram lifting slide up for choke! cheers paul
Here's an animation showing what happens when the choke is opened.
Roger
Current rides
1983 GS 850G
2003 FJR 1300A
Gone but not forgotten 1985 Rebel 250, 1991 XT225, 2004 KLR650, 1981 GS850G, 1982 GS1100GL, 2002 DL1000, 2005 KLR650, 2003 KLX400
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While the carbs are off, now's the time to give the carbs a proper cleaning and new O rings1978 GS 1000 (since new)
1979 GS 1000 (The Fridge, superbike replica project)
1978 GS 1000 (parts)
1981 GS 850 (anyone want a project?)
1981 GPZ 550 (backroad screamer)
1970 450 Mk IIID (THUMP!)
2007 DRz 400S
1999 ATK 490ES
1994 DR 350SES
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Just two suggestions here.
1. What year is your bike? Over the years, there were THREE different types of carbs on a 550L, it would be nice to know which ones are being discussed.
2. Punctuation, spelling and grammar are your friends. Your post is a bit hard to read, but I got most of it.
.sigpic
mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
#1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
#2 son: 1980 GS1000G
Family Portrait
Siblings and Spouses
Mom's first ride
Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
(Click on my username in the upper-left corner for e-mail info.)
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Yeah, at least hit the space bar at he end of each sentence
Then, go to your settings, signature and put 1982 GS 550L there
You need http://zeus.mtsac.edu/~cliff/storage..._77-82_all.pdf
and, while your Dad may resent it, read this 1st https://www.thegsresources.com/_foru...bie%20mistakes
It's the hundreds of years of our accumulated knowledge, created by doing things the wrong way, then figuring out the right way
PS, CycleOrings.com ships worldwide1978 GS 1000 (since new)
1979 GS 1000 (The Fridge, superbike replica project)
1978 GS 1000 (parts)
1981 GS 850 (anyone want a project?)
1981 GPZ 550 (backroad screamer)
1970 450 Mk IIID (THUMP!)
2007 DRz 400S
1999 ATK 490ES
1994 DR 350SES
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Forum LongTimerGSResource Superstar
Past Site Supporter
Super Site Supporter- Mar 2006
- 35241
- Torrance, CA
Newbie Mistakes thread and carb rebuild tutorial linked in my signature. Both should help you.Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection
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Originally posted by tom203 View PostYou can’t just look at these carbs and decide “they’re clean”. There are tiny passages in carb body that feed/control the idle and low speed circuits . Once clogged, bike will start but will behave badly.
[ATTACH=CONFIG]62269[/ATTACH]
the little hole under diaphragm feeds air to choke plunger..making a mixture ....it doesn’t do any lifting cuz at startup and low speed diaphragm isn’t functioning. However if “choke” is left on ,this excess mixture will cause high idle
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That video is not perfectly correct, but it's close enough to give the idea.
First of all, "choke" is a term that does not technically apply here. What we have on our carbs is an "enrichment system". The system does the same thing, but it does it by opening specific ports to supply a richer mixture not by closing off the inlet of the carb to choke it.
If you actually had the carbs all the way apart, you would have seen the brass plunger that would slide horizontally to uncover that hole under the diaphragm. When holding the plunger, you should have seen the pin on the end. When the plunger is pulled to richen the mixture, the larger barrel part uncovers the air port, that pin moves away from a fuel port that goes down into the float bowl.
One other thing to note is STARTING TECHNIQUE. Because of the way the enrichment system works, it relies on the high vacuum of a CLOSED throttle. When trying to start the cold engine, you turn the key ON, move your "choke" lever to somewhere between 1/2 and full ON, pull the clutch lever and push the starter button. Do NOT touch the throttle. If you move the throttle AT ALL, the open throttle butterflies will destroy the high vacuum that is needed to pull the gas through the enrichment circuit. Once the engine is running, adjust fast idle speed with the "choke" lever, NOT the throttle.
You say the carbs have been "cleaned in the bath twice at the shop".
What liquid was in the bath? How long were the carbs in the bath?
.sigpic
mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
#1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
#2 son: 1980 GS1000G
Family Portrait
Siblings and Spouses
Mom's first ride
Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
(Click on my username in the upper-left corner for e-mail info.)
Comment
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choke gs550l 1982
Originally posted by Steve View PostThat video is not perfectly correct, but it's close enough to give the idea.
First of all, "choke" is a term that does not technically apply here. What we have on our carbs is an "enrichment system". The system does the same thing, but it does it by opening specific ports to supply a richer mixture not by closing off the inlet of the carb to choke it.
If you actually had the carbs all the way apart, you would have seen the brass plunger that would slide horizontally to uncover that hole under the diaphragm. When holding the plunger, you should have seen the pin on the end. When the plunger is pulled to richen the mixture, the larger barrel part uncovers the air port, that pin moves away from a fuel port that goes down into the float bowl.
One other thing to note is STARTING TECHNIQUE. Because of the way the enrichment system works, it relies on the high vacuum of a CLOSED throttle. When trying to start the cold engine, you turn the key ON, move your "choke" lever to somewhere between 1/2 and full ON, pull the clutch lever and push the starter button. Do NOT touch the throttle. If you move the throttle AT ALL, the open throttle butterflies will destroy the high vacuum that is needed to pull the gas through the enrichment circuit. Once the engine is running, adjust fast idle speed with the "choke" lever, NOT the throttle.
You say the carbs have been "cleaned in the bath twice at the shop".
What liquid was in the bath? How long were the carbs in the bath?
.
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Just note you won’t be able to see them very well. What everyone is really trying to say is do the work yourself using the procedures Nessism wrote and you’ll be better off. You can also send them to someone here on the forum to do for yousigpic
Cowboy Up or Quit. - Run Free Lou and Rest in Peace
1981 GS550T - My First
1981 GS550L - My Eldest Daughter's
2007 GSF1250SA Bandit - My touring bike
Sit tall in the saddle Hold your head up high
Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"
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