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Any ideas on the cause?
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OK, it's nice that we know what bike we are discussing, but we are not quite clairvoyant enough to know the maintenance history or the conditions under which you are trying to do this.
Yes, we have LOTS of ideas, but let's narrow down the symptoms a bit, then we can offer some ideas that might be rather close.
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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
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.) -
I've had it a couple of years. It's been in the shed. It's a Suzuki 1983 GS 450L. It idled fine and started ok when I purchased it. I got it on the road a couple of weeks later and it has little power and won't go over 40 mph and will backfire through the carbs. That's all I can tell you.
1983 Suzuki GS450L.Comment
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Based on the very minimal info provided, my top three things to check are mouse nest materials in the air box, corrosion in the fuel tank, corrosion in the mechanical advance mechanism. Let me know if I win something...
1981 GS450TComment
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Well, I took the seat off yesterday to check the air filter and it was full of mouse nest material. Filled to the rim. Cleaned it out. Charged the battery and got it running today. Runs on one cylinder only. Will idle only.Comment
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Please check the Newbie Mistakes thread linked in my signature to see if anything rings a bell...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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1980/1981 GS450 - GS500 Cylinder + Piston Swap - "De-L'ed", custom seat, CB350 bits, 18" rear, etc.
1977 GS550
1977 GS750 - Cross country trip threadComment
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not sure if you got this fixed or not but i had a similar issue when my petcock was allowing gas down both the fuel line and also the vacuum line connected to the left carb. it should not be coming out of the vacuum line if you pull it off and look. this creates such a rich symptom the bike intermittently runs on one cylinder (the right).Comment
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Valves/compressionCarbs
Fuel valve
Just a good start1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
1985 GS1150ES stock with 85 Red E bodywork.
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