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Hi , I have a 1979 suzuki gs 850. I just got done rebuilding the top end When I tried to start it for the first time it backfired trough the carbs and shot out a flame. The muffler was also piping while trying to start. Thanks for any help you can offer.
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Either cam timing is off or more likely you have the spark plug wires reversed. I believe the left coil powers 1&4, right coil powers 2&3 -
I enjoy reading posts like this, knowing I have my first top end rebuild looming this winter :-(Comment
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Just follow the directions, pay attention to details, ask questions if you are not sure, you will be fine.
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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.)Comment
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Timing was off. Still can’t get it to start thoughComment
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Carbs clean and airbox installed?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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Yes , soaked carbs and cleaned out everything and the air box is installed.Comment
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Got it to start. Now it won’t stay running / idle. I have to twist the throttle to keep it running.Comment
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Did you crank up the idle stop? Vacuum sync?
Be sure to put those new rings under some load right away. Don't thrash it, just ride it with an assertive in-town driving pattern.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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I will try the idle stop. I don’t have a vacuum sync to adjust with. Just wanted to get to where I could ride to a friends house who has one.Comment
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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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Cam timing was off. Got it fixed and replaced the spark plugs. Will run with the choke on but won’t hold idle.Comment
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Time to clean the carbs per the tutorial. You won't be the 1st person to have to reclean old carbs
Since it runs with the choke on, you have air, spark and some fuel.
You need to get the rest of the fuel1978 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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my carbs are different from the tutorial. Is there another tutorial for other carbs?Comment
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Yes, on Basscliff's site where you found the CV carb tutorial is one for the VM carbs which you probably have.
Here's the direct link to it
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"Comment
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