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79' GS 750 dies when given gas

  • Thread starter Thread starter Anonymous
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Anonymous

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I can't figure out what's wrong. I've got a 1979 GS 750, and when I give it gas it dies, sometimes. Other times after messing with the idle it works, but sometimes stays reving at a certain idle when revved. I checked and no cables are sticking, and the throttle valve in the carb is shutting all the way. One other problem is it dies when you come to a complete stop. I need help!
 
Re: 79' GS 750 dies when given gas

Depending on milage, you may need to check valve clearances. Valves not closing will certainly stop it from idling. :-) If you still have points, that would be the next thing to check and probably replace and set ignition timing. After that, check that you have at least 12 volts going to the coils. Then check resistance on the coils primary and secondary. If all is well there, I would synch the carbs. Check battery voltage to be sure you always have a minimum of 12.25 volts and preferably around 12.8 to 13 volts in the battery.

Also check for induction tube leaks between the carbs and cylinder head.
When is the last time you replaced the 4 large induction tube/head "O" rings?
Check that your aircleaner isnt oil soaked and clogged.

Earl

RT18092 said:
I can't figure out what's wrong. I've got a 1979 GS 750, and when I give it gas it dies, sometimes. Other times after messing with the idle it works, but sometimes stays reving at a certain idle when revved. I checked and no cables are sticking, and the throttle valve in the carb is shutting all the way. One other problem is it dies when you come to a complete stop. I need help!
Click to expand...
 
I had a similar problem on an older gs. It would rev so far and stay there, I seem to recall it was around the rpms that the jets allow more fuel to enter the engine. I forget the exact process from pilots to main sequence. It ended up being corrosion in the carbs, plugging up the jets. I cleaned them up and it ran much better.
katguy
 
At that milage, I would definitely check valve clearances first and then the previous list.

Earl


RT18092 said:
It's got about 22,000 miles.
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