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Not sure about the settings on the petcock. I have a lot of fuel running out of the carbs while its sitting. What is the orientation of the screw for on off and prime?
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Might have to get confirmation from someone who has one, but I believe that the position shown is ON, or RUN.
Turned vertical is PRIme, but, unlike other petococks, it does take a "puff" of vacuum to get it going in PRIme, after which it will keep flowing until turned horizontal.
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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
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Like all GS1000, and every other GS I know of, there is no off. Vertical is prime, horizontal is off. Prime isn't really prime either, because it STILL takes engine vacuum to turn it on. It is suposed to stay on once it starts to flow in prime, but it may or may not depending on if the valve sticks (mine did, so I put a brand new one on which also sticks). If yours is in that position and it is leaking gas from the carbs when sitting, , the petcock is probably bad.sigpic Too old, too many bikes, too many cars, too many things
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There is a check valve built into the back cover which holds the prime actuated once it sees some vacuum suction. Seems simple enough but not the most reliable setup. New OEM petcocks are about $75, or aftermarket equivalents are $50. I have a spare if you get stuck and can't find one.
BTW, the factory suzuki service manual has a ditty on how the petcock works. Look in the 1980 supplement section. Free download on Basscliff's website.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-ResurrectionComment
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A quick fix is to put an inline plastic Briggs and Stratton shutoff valve between the petcock and the carbs. I detest vacuum petcocks even when they function as designed.
Great for test tanks too, and I also install them on Briggs engines which don't have them, such as my riding mower.Comment
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I actually adjusted it this way. It was sitting between vertical and horizontal. I set it just before the pic and we shall see if I get another puddle tonight.
Thanks or the input guys!Comment
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You probably will. You should check and make sure you're not flooding your crankcase with that gas.-1980 GS1100 LT
-1975 Honda cb750K
-1972 Honda cl175
- Currently presiding over a 1970 T500Comment
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Yeah,why don't you be cautious and disconnect fuel line at petcock, add temp line and run that into some container, like your lawn mower tank - then check in morning.Petcocks often malfunction.Originally posted by Tom R View Post1981 gs650L
"We are all born ignorant, but you have to work hard to stay stupid" Ben FranklinComment
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........................... i have a vacuum petcock on a 1980gs1000e ,,,,, on prime if you have cranked the motor a few times it will stay open ,,, it should be turned to the horizontal position once your bike is running ... otheywise it could flood .... regards oldgrumpyOriginally posted by 1980GS1000 View Post
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I had to replace mine. The prime function still doesn't work as it should.NO PIC THANKS TO FOTO BUCKET FOR BEING RIDICULOUS
Current Rides: 1980 Suzuki GS1000ET, 2009 Yamaha FZ1, 1983 Honda CB1100F, 2006 H-D Fatboy
Previous Rides: 1972 Yamaha DS7, 1977 Yamaha RD400D, '79 RD400F Daytona Special, '82 RD350LC, 1980 Suzuki GS1000E (sold that one), 1982 Honda CB900F, 1984 Kawasaki GPZ900R
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