Question about 1980 Suzuki Gs 550 L

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I have a 1980 suzuki gs450.. the engine turns over but wont fire up.. even when i spray starting fluid on it just backfires.. i need help.. its my first proyect!!!!!

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  • pschoch Nov 17, 2010

    I am asuming that the carbs have been cleaned and if they are ok, I would start with the right side ignition cover that is held on with 3 screws and check for bad wiring, rust, or buildup on the flyweights. After that all checks out, haqs the coil been checked to see if it's weak?


6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: dont want to start sum times fire right up next time wont start ?

b sure u have good spark 2 all 4 plugs, if not, check 4 weak ground ign. sys.-check p.up coil-

Posted on Mar 27, 2009

  • 15 Answers

SOURCE: Float setting for BS34ss carb

I have a set my float to 22.0 +- 1.0 for a Mikuni carb.
To set floats, drain the carbs, pull the carbs from the bike invert and remove float bowl.
With the carb inverted, take off the float bowls. Take off the gasket. Use a vernier caliper or an accurate device to measure from the carb body to the top of the float block.
Here is are a couple of good sites about carbs and such.

Posted on Aug 18, 2009

  • 1584 Answers

SOURCE: after cleaning the carb it backfires in the carb

How did you celan the carbs?? Need to strip and dismantle all parts / blow out with compressed air / Check float adjustment etc./ reassemble, ensure there are no air leaks.

Posted on Mar 17, 2010

  • 1978 Answers

SOURCE: 1980 Suzuki GS450, jump started my bike and now no

It is OK to jump start your motorcycle from a car battery as long as you do not crank the starter too long (it will burn the armature) and as long as the car/other vehicle is not running when you jump start your bike ( you can damage your electrical components( igniter box)). See if you can exchange one with a friend to see if that is the bad component.

Posted on Nov 08, 2010

  • 5370 Answers

SOURCE: I have a 1980 Suzuki

First remove and re-check, have you connected the battery terminals to proper locations.Is any of the battery terminal got loose or burnt.Is the battery terminal bolt, getting in contact with other metal part and shorting.---------- Tighten the frame ground, battery negative, battery positive, starter solenoid.
Dead battery.( i agree battery is replaced., but still check battery voltage)
The battery positive cable goes to the starter solenoid.
With a large screw driver, touch both terminals of the solenoid at the same time (careful of sparks).
If the starter motor turns, the battery is OK.--------
Check the main fuse.
Could be bad ignition switch.
With a good battery and the key on, the main fuse terminal should have battery voltage (check with a test light).If there is no voltage , bad ignition switch. ------------- Check the voltage to battery, the voltage to starter and voltage for voltage regulator.If battery, has voltage, and starter has voltage.Then check the voltage to voltage regulator/.If the voltage regulator is having no voltage, then its the cause of problem/.---------- This will help.Thanks.Helpmech.

Posted on May 08, 2011

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1980 Suzuki GS450, jump started my bike and now no spark, I blew the main fuzz, replaced it but still now spark, could the Igniter have gone bad or other ignition related problem be why it has no spark, I...

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