Question about 1985 Suzuki GSX 550 ES

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Gsx550 running weak and misfire at revs over 5000

I have recently rebuilt a gsx 550es (1983) runs well but misfires at revs over 5000(approx 3/4throttle) i have cleaned the carbs, fitted new plugs and airfilter. when cheaking the plugs it appears to be running weak but i cant find any info on setting the mixture. Please help.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: idle speed problems

Hi Walker14,

You have to sync thecarbs and also you will have to reset the air-fuel mixture screws.
One of the carburators should be factory adjusted, I dont wn a kawasaki but I own a YAMAHA SECA XJ750R and thro it I am sharing my experince.
Once you have located the factory preadjusted carburator you can thn set the others to its specs. I use the feeler gauge to do for my bikes carburators and it works fine.
With regards to the mixture screw..... get the all in tightened but slowly aas to not damage the pin end of it!.
Start the bike and get it to normal running temp and thn set the screws 2 and half turns out...you may need to set your idling speed before you begin this setting of the mixture screws, you prolly will hveto go higher on revs or vicecersa ....onc eyou are at the mixture screws and adjusting them , you will surely note the differenc ein sound of he bike an its idling ..
Hope this will help.


Knight.

Posted on Feb 02, 2009

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SOURCE: rebuilt carbs-starts and idles but wont rev up without choke on

sounds like the main jets are partly pluged, you must remve all brass jets and seats including needle jet and its slide soak in carb cleaner and blow out with compressed air only.. hold up to bright light to verify if all are clean. jim

Posted on Mar 29, 2009

  • 47 Answers

SOURCE: Suzuki GSF400 Bandit problems with tick over.

as you have replaced carbs you will need to retune for fuel intake also check its getting enough air ie.. air filter has been changed or is clogged

Posted on Jun 17, 2009

  • 12 Answers

SOURCE: 1994 gsx1100f highspeed engine probs

Your main jets sound like they too small or partially blocked with dirt/varnish. If steady cruising at 4500 is smooth, and you open the throttle somewhat quickly, it stumbles a bit, and breaks up it is too lean or the jet is too small. If it bogs, and smokes it's too rich. You could pull one of the spark plugs and check it's color. It sounds to me that it is too lean, perhaps aftermarket exhaust was fitted, and the carbs weren't re-jetted to compensate? I hope this helps.

Posted on Jun 29, 2009

  • 11 Answers

SOURCE: 1991 gsx750f running lumpy

balance the carbs and clean the plugs.

Posted on Aug 18, 2009

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Next time you run it, take the gas cap off when it starts to misfire. If it runs OK with the cap loose, your cap vent isn't working.

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Hi, Nick and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition and leaking check for spark leakage in the dark.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module, and or sensor.
5. Battery nearly discharged.
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For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Need tow know factory size main jets for a 1983-1986 suzuki gs 550es


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My GSXR 750 J runs extreemly rough between 7000 and 9000 rpm. Its a mildly tuned engine with after market cams, a dynojet kit and I recently installed some inline fuel filters. The bike runs perfectly...


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Happy hunting

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I have an89 xj750 Yamaha.It runs fine when hot ,except occasional


please visit this site there's a lot of info with regards to our bikes!
www.xjbikes.com

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