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Hey guys, I have a 1982 Gs750t 16 valve engine. I recently changed tanks, (aftermarket tank) and went to a manual petcock. Bike cranks and runs good at Idle, but if i give it some gas it starts to shut down! Almost like its running out of gas. I let off the throttle and runs fine. The carbs have been rebuilt, everything is new in them and are rejetted for pod filters and 4 into 2 exhaust. It also has dyna electronic ignition. What do you guys think? Float level too low? Coils shutting down? Timing off? I static tested the dyna it is dead on on the 1-4 side. Had a little problem with the 2-3 side. The light came on right over the 2-3 and had not made it to the mark yet. Its not real plain to read on that side. Any help would be greatly appreciated.
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Sounds like a vacuum leak; did you cap the vacuum port on the carbs when you installed the petcock?Cowboy Up or Quit. - Run Free Lou and Rest in Peace
1981 GS550T - My First
1981 GS550L - My Eldest Daughter's - Now Sold
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" -
That...and how well are you letting it warm up?? Need some heat built up in the cylinders is what i find.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
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Where is the mixture screw set at?? Have they been vacuum synced and are the valves adjusted within specs??Last edited by chuck hahn; 10-12-2012, 11:08 PM.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
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Mixture screws set at 2-1/4 turns out. Carbs synced. Valves were adjusted at .005Originally posted by chuck hahn View PostComment
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When you say jetted for pods, did it run well before you changed the tap?79 GS1000S
79 GS1000S (another one)
80 GSX750
80 GS550
80 CB650 cafe racer
75 PC50 - the one with OHV and pedals...
75 TS100 - being ridden (suicidally) by my fatherComment
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I hope you meant .05 MM which is approximately .002 and not .005. At .005 , youre way out of tolerance on the valves. You would be more around .11MM which is above the service specs for valves.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
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Sorry, too many zero's. Yes .05 is what they are set at.Originally posted by chuck hahn View PostComment
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can't jet for pods with vacuum GS carbs.
you need a st.3 jet kit.
also...what type of filters?
possibly chrome emgo 28$ for set of 4 filters?Comment
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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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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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.05 parsecs
It's a bit out of spec, but it should run
1978 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 350SESComment
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MM, since it runs on rice!Originally posted by Steve View PostPoint zero five WHAT???
Meters?
Miles?
Years?
Measurements are virtually useless unless the units are stated.
.Comment
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It does sound like its starving for fuel. No kinked or pinched line, I can see it from the tank to carbs. Petcock is working properly. The tank has a vented cap, it is vented to a barb on the bottom of the tank. Maybe i'll try capping it as well.Originally posted by old_skoolSounds like fuel starvation, since you just had the tank off, look for a kinked fuel line...ask me how I know
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Run it with the fuel cap off to see if it's a vent problem.
You said it was jetted for pods. What jets are in there?79 GS1000S
79 GS1000S (another one)
80 GSX750
80 GS550
80 CB650 cafe racer
75 PC50 - the one with OHV and pedals...
75 TS100 - being ridden (suicidally) by my fatherComment
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