79' GS1000 problems...

[Anonymous]

Ok, I got a 79' GS1000 a while back for free. It didnt run when I got it, so I did a little messing around, and figured out that it was only firing on 2 cylinders. After fixing that, I attempted to ride it. For reference, it has pod type filters, and a V&H exhaust, although i dont think they are leading to the problems...

The tank doesnt have a petcock on it, so I had another tank I had laying around strapped to it for fuel, and testing purposes.

I got it to start and run, but not extrememly well. Up to about 4500 RPM's its a dog, and cutouts out really bad, and will just about die. Above 4500 or so, it seems to run great, awesome actually.

Any ideas on what to check first? I am thinking carb trouble, but am not sure. I took the bowls off the carbs and cleaned them out, but something is just not right. Do you guys think the carbs need to be balanced?

I know that the stock pertcock is vaccum operated to an extent, so i had the vaccum line from the carbs plugged up. Could this be causeing the problems? I wouldnt think so since it runs fine up top...

Any ideas would be great. I am thinking abour taking it to a local shop this weekend, but am willing to try anything first...Thanks in advance...

[Anonymous]

Sure sounds like dirty carbs, I'd go directly to the carb section of this site.

[SqDancerLynn1]

I would say you have a jetting problem . DO you know if it was rejetted for the pods??? The installation of pods will make it run very lean

[Anonymous]

I am going to go through the carbs again tonight and try it once more. I dont think it has been jetted for the pods, I understand that they can make it lean, but i figured it would make it lean throughout the entire rpm range. The bike felt awesome above 4500 rpms, it was just a chore and hassle to get it up that high. When I say it cutting out and bogging below 4500, i mean to a point that it will die...

[Anonymous]

OK, i went through them, they were pretty dirty. But I stubled upon something that might really be the problem...

This is a pic from the carb repair page that I photoshopped since I dont my digital camera right now. Anyway, as you can see in the pic, of the normal one, it has a very small hole in the end of that tube. 3 of mine are normal, and one of them apears to have broken open on the end, like i tried to show in the pic...Could this be it? Is it possible to replace just that tube, or is that carb now trash? Any ideas ?

http://www.fbodypages.com/joe/carb.jpg

[SqDancerLynn1]

That tube draws fuel into the carb for the choke circuit should be fine.
What size are the main jets ??

[Anonymous]

OK, good. I was hoping that wasn't the problem...

The main jet was a 261 I believe, and the pilot was a 30...Is that stock?

[SqDancerLynn1]

Main jet should be # 95 stock maybe 112.5 with the pipe & pods
recheck the #'s

[Anonymous]

Well...I put them on, and it still wont run right. I can about get it to idle, but only with the choke on. If I try to give it much gas, it dies...It backfires like crazy...I need to get the correct firing order. I have 2 different manuals, that seem to list 3 or 4 different firing orders...

Someone tell me, if I am sitting on the bike facing forward, The front wire from the coil on the left should go to what cylinder? Rear wire from coil on left? Front wire from coil on right? and rear wire from coil on right....? Like I said, my books appear to list 2 or 3 different ways...

Damn this thing...LoL...

[Anonymous]

Main jet should be # 95 stock maybe 112.5 with the pipe & pods
recheck the #'s

I'll check them again...i didnt think those #'s sounded right...

[Anonymous]

I just did a little search that said the left coil should fire cylinders 1 and 4, while the right coil should fire 2 and 3? Is this right? I had them this way and it didnt seem to want to fire off..

[SqDancerLynn1]

that is correct the book shows left coil = 1&4 with white wire to points & orange/white tracer to 12V

[KEITH KRAUSE]

OK, i went through them, they were pretty dirty. But I stubled upon something that might really be the problem...

This is a pic from the carb repair page that I photoshopped since I dont my digital camera right now. Anyway, as you can see in the pic, of the normal one, it has a very small hole in the end of that tube. 3 of mine are normal, and one of them apears to have broken open on the end, like i tried to show in the pic...Could this be it? Is it possible to replace just that tube, or is that carb now trash? Any ideas ?







http://www.fbodypages.com/joe/carb.jpg

In the second photo, the starter jet is missing from the tube. That carb will run very rich or possibly foul the plug when you apply the choke.
As for the stock jetting, you would have #95 mains, jet needle e-clip in the 3rd (middle) position, and #15 pilot jets. If you still have the stock settings, the bike is running very lean, regardless if it feels strong at higher rpm's.

[Anonymous]

Well, I seem to have made a little progress. I figured out that whoever had this before had the coils wired backwards. So my right coil controls 1 & 4 and the left controls 2 & 3. I got it to start, and if I catch it right, it will rev a bit, but mostly just likes to backfire or bog and die. Not only is it afterfiring out the exhaust, but its also back firing into the carbs a bit too...

It will also only run with choke on. If I turn the choke off, it dies...I think this is why it bogs when I give it gas though, being that its choked. What can make it have to have the choke to run? Being too lean at idle?

Here's a little video of me jacking with it...It starts easy, revs once decent, then no more. It dies once or twice 2 from me turning the choke off.

Dont mind the tank I have strapped to it. The original tank is missing the petcock, so I needed something to feed the fuel with bigger than a funnel. And I really dont know why I was wearing thos work boots with shorts either...LoL...

http://www.fbodypages.com/joe/suzuki.wmv

So can you guys conculde anything from that? You can see me giving it gas, and then it bogging down.


What are the stock turned out settings for the air screws on the sides of the carbs...?

[KEITH KRAUSE]

Well, the carbs almost certainly need work, and I bet the ignition timing is off too. If you have the stock points, clean/adjust or replace them and the condenser.
The "spitting out the carbs" is a very lean condition, at least at these minimum throttle openings. That could be dirty carbs, poorly synched carbs, intake leak, float levels, poor fuel flow to the bowls...
The side air screws are adjusted using the highest rpm method. Right now, you can't set them perfectly. But set them to 1 5/8 turns, and that will be close enough at this time.
Can you show a pic of the carbs? I'd like to see that they're the stockers?
I assume you have the vacuum port at carb #3 plugged? Or are you using it for the temp tank?