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Almost complete 1982 gs550l but...

  • Thread starter Thread starter Defore
  • Start date Start date
D

Defore

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OK so I hope this is my last problem. I have a 1982 gs550l with 3k something miles. I have replaced the coils, wires and installed the dyna s. Also completely broke down the carbs and dipped over night, replace all o-rings and got them from the person on this website I was referred too. Stage 3 dyno jet kit since I have 4 into 2 straight pipes ( way to loud ) and the 2 k&n's that are for all 4 carbs. I've also adjusted to the correct float level sgince I had lots of fuel in my oil. And last i had a very good shop adjust my valves and change all shim. When i first got it back after the valve job I put gas in the carbs and it fired and that was with the screw was off I think around 4 turns out. So i pulled the carbs off and that's when i adjusted them 2 turns out and adjusted the floats to spec. Now last night. I go and put the carbs and filters back on and it'll only idle at full throttle till its almost out of gas then it'll run perfect...well kind of. It'll only fire on my left side cylinder 1 and maybe 2. I can hear it and the exhaust is hot on left and cold on right. But when its about out of gas i can hear the right side start kicking in and out (start to fire). I don't even know where to start since I've replaced everything and why the hell would it start firing when almost out of gas!? Please help. This is my last issue then she's finally back on the road...hasn't been since 94 ( when last owner had her )
Thanks in advance!
 
im having a similar problem with mine it might be the coil packs my bike isnt firing on all four yet either i have one that i cant figure out but its to my understanding that each coil pack controls everyother pipe.. also coil pack is under the tank so maybe the weight of the gas maybe got a wire shorting or something?
 
Well I'm using a funnel as a tank since mines in the possess of being painted. Bit all of my plug are firing when i hold them to the block. I don't even know where to start.
 
I'd recheck the carbs and also take a look at the plugs and see if they're wet with gas. My guess is your carbs are wickedly rich hence why you can only idle at full throttle (maximum air coming in) and why it starts running better when it's about out of gas (the fuel mixture leans out tremendously).
 
Even when i had the carbs off I sprayed some starting fluid in 3 and 4 to see if I'd get a pop and nothing till I sprayed it in 1 and 2 then i got a few second idle.
 
How do those plugs look? Very black? If they're carbon-fouled they won't fire even when the mixture is right. They can get fouled by running rich. I would say that you're running very rich on 3 and 4 for some reason. Could be the needles not seating, or maybe the o-rings for the inlet valve seats got pinched during installation?
 
When you say needles not seating your only talking about the needle that's pushed in by the float? If so i just replaced those and the plugs ate brand new. I havnt driven this bike a total of a mile yet.
 
Take carbs off, hold in normal position somehow (vice, girlfriend, etc.), then use your funnel fuel tank to put fuel in rail and watch what happens. Hide the starting fluid.
 
Lol OK sounds good. And what I will see but shouldn't is?...fuel over flowing?
 
Yes. If the fuel is flooding through carbs 3 and 4 then that's going to have you running pretty darned rich on those two. Once the fuel level drops enough so the carbs are not being flooded then the mixture leans back to proper and those two can kick in.


Defore said:
Lol OK sounds good. And what I will see but shouldn't is?...fuel over flowing?
Click to expand...
 
OK so i did what I was told. Took off the carbs sat them level poured fuel in the carbs sat and waited ( so far 20 minutes) and nothing. No fuel is over flowing into anything? So now what? Please help.
 
Last edited:
Defore said:
OK so i did what I was told. Took off the carbs sat them level poured fuel in the carbs sat and waited ( so far 20 minutes) and nothing. No fuel is over flowing into anything? So now what? Please help.
Click to expand...
So , you got the funnel fuel tank over carbs,so gas is pushing on the float needles, and no sign of fuel leakage from carbs 3 and 4 ?
 
A funnel has been sitting there for a few hours. Its not a big funnel but...
 
Defore said:
A funnel has been sitting there for a few hours. Its not a big funnel but...
Click to expand...
Well, it ain't the float needle seats leaking then! But, where is this fuel coming from that fouling #3 and 4? leaking choke plunger? needs more thought.
 
That's what I'm saying! Blowing my mind...maaaaaybe just maybe my plug caps are cutting in and out?
 
I'll assume you checked for spark on 3 and 4..... and that plug wires are on correct plug..... Anyways,will this bike start without "choke" on ? After it runs a bit on 1 and 2, pull spark plugs 3 and 4, are they dry or wet?
 
Yes it starts without choke and I've check the spark and wires and they are wet.
 
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