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Discussion Starter · #1 ·
Ok so you guys are very smart on here and this forum is great in assisting with problems.

So my buddy bought a 1979 suzuki gs425L. when he bought it, it ran, but with the choke on all the time. the bike sat for 12 years with out running but surprisingly enough it started but shortly died. The plugs are fairly new, we replaced the fuel line going from the tank to the carbs, new air filter, new ignition, and battery. He took the carbs apart to clean them and when he put them back together, it wont start now at all. There is gas in the float bowls and the bike will start for about one second with staring fluid into the spark plug holes.
 

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Discussion Starter · #3 ·
The plugs are new, clean and not wet. It has spark. It must be a fuel problem, because it starts on starting fluid but shuts off once the starting fluid is burned.
 

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Discussion Starter · #5 ·
I'm pretty sure it was put back together correctly, theyre both apart once again. He used 2 bottles of carb cleaner but I was told that this just pushes the dirt around into all of the little ports. Could this have made the problem worse? My stepdad's friend told me this. He always gets his carbs baked in water or something along those lines to clean them out. This is supposed to be the best way to get all the dirt out.
 

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It does spark, fuel feeds into the carb without a problem, hum. Not to sound bad here... but ignition is set to on right?.... as to the carb usually I use a air pressure to clean the ports
 

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When he put them back together, did he turn the air/fuel mixture in all the way? If he did, there's no gas getting to the venturi in the carb to be burned, which is why the bike runs on the starting fluid, until it's gone, and then quits... Back out the screws in increments of one turn. So all the way in, one turn out on both, try to start. Then another, try to start. Once it's started, adjust in/out accordingly until it has a nice feel off of idle. If it has upper range issues, we'll deal with those once it starts...

Part 17, I believe
http://www.bikebandit.com/suzuki-motorcycle-gs425ln-1979/o/m6026
 

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Discussion Starter · #10 ·
Ok thanks spooph, I'll ask him tomorrow and give you an answer by Sunday hopefully. But I think that's what he did come to think of it.
 

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Discussion Starter · #11 ·
Ok I got the answer sooner than I thought I would, but to answer your question spooph, he says that the air/fuel mixture screw is set at factory settings according to his service manual.
 

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So, if it's getting fuel, and it's getting spark, it should at least sputter... If it's not sputtering, the timing is off, which would be weird since he didn't touch that... Nah, there's got to be something the matter with the carbs and how it's put together. Unfortunately I need more info, pictures if possible.

I guess I should also ask how experienced is he? I was never trained and learned by making some stupid mistakes in my time.
 

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Discussion Starter · #13 ·
The problem is solved now. It turns over now and runs without the choke. All he did was take the air cleaner out and shoved a rag in there to make an air tight seal, new plugs (cuz he dropped one on his garage floor lawl), gave the battery a good charge over night (this bike is also kick start but it's not worth the effort to kick a 425 over nd over... P.I.T.A.) but now the bike runs great and hes just waiting on the title now.
 

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glad it's running. Ever figure out why it wasn't running? From your previous statement, I gather that by restricting the airbox with a rag in it, he got it to run... Which means it was way too lean after he put them back together?
 

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stupid him... How are you supposed to learn, build a large body of knowledge to reference in the future if you aren't provided with the knowledge... Punch him in the face for me or something. Thanks!
 

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Discussion Starter · #17 ·
Hahaha. we went for a nice little ride through the countryside of where I live today. He doesn't have a plate/ title yet (still waiting for it to come in) and no insurance. We saw one cop at a speed trap and turned around. Most law enforcement was preoccupied with an accident down the rode from his house.
 
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