20 Most Recent 1980 Suzuki Gs 550 L Questions & Answers

First thing I would do is change the battery and spark plugs. start there.

float needles maybe some s#t behind them keeping them open.

Try air filter

they fire 1and 4 2and 3 only two coils 1_4 2_3

some bikes have idling screw on carb.have you check to see if your carb booths are seated and not sucking air.

there is a small port on top of the second carb on the right, that goes to the small port on the fuel petcock mounted to the tank. The main fuel supply (larger port on tank) goes to the bottom fuel supply rail with the only carb port on that rail. The upper two ports between #1 & #2 carb and between #3 & #4 carbs are vents and those hoses get plumbed down under the air cleaner, careful not to pinch the vent hoses or the bowls will not fill up with gas. This is the same for an automatic petcock or a manual one.

sounds like a vacuume leak

Your petcock needs to be rebuilt (if parts available), or replaced, if it does not shut off the fuel. It also may not be saving reserve fuel , if gas is bypassing the ON position. You may also need a new fuel filter .Maybe add an additional in line filter. If you have replaced the float needles and the carbs are still overflowing you probably have a problem with rust in the tank. Have the inside of the tank cleaned or use a rust removal kit on the tank and see if this does not solve the problem. Try to avoid fuel tank liners if possible , they can cause more problems than they solve.

The ignition unit may be bad, only a dealer shop can test it and sometime they can't, or won't.

did you change the bulb? does head light work?

starter solenoid knackered

fuses then check ignition switch

try carefully shorting a screw driver accross solenoid the two big nuts with ignition on . try a meter on continuity starter casing to earth

Sounds like a loose connection or poor ground clean terminals with sand paper Also make sure that the battery terminals are not broken or cracked

Are you asking if lead free fuel will work in this model then the answer is maybe. It all depends on the valve guides and seats that were fitted. Check with your local Suzi agent. If the answer is no then you could consider a lead pack in the tank. I know these work for old autos I'm not sure about bikes though.

Not certain at all, but I would think you probably have a short in the circuit somewhere. Have you inspected all the electrical on the bike? Really not too difficult, I had to do the same thing last year since I couldn\'t get mine to turn over. Remove the gas tank (quite easy, a single bolt under the seat), and inspect all the wiring for either a corroded wire or a short which is touching steel and grounding the circuit somewhere. In the end, on mine, it was the horn which was breaking my circuit. Hope that helps, or it\'s at least somewhere to start. Some one else might have better advice. Good luck!

Don't ask such questions here is advisable to you, as setting your vehicle on anybody else's remote instructions maybe of harm to you and your vehicle, I'll suggest you to contact a Professional Mechanic to do so, he'll need your own experience at both RPMs and then will set one to your choice, according to your Test Drive at both.

adjust off the cable so its slack ! then between the carbs there should be the idle adjuster screw and back it off till rpm is about 700 ! rev engine and see if it returns ok ! ? if not then remove carbs and free off the butterflys etc etc !

Sounds like you have a sticking float in your carb that is letting the fuel leak through the carb and into your motor. You need to remove the carb and clean and check float and drain the oil and replace with new.

with electrics start at one point and eliminate each possible cause ie; is the kill switch corroded inside the switchgear due to water ingression, when did you last change the plugs.is your coil working correct.is there a loose/damaged connection in the ignition system wiring, a bad earth perhaps.is there dirt on your electronic ignition pick up or if you have points do they need cleaning/replacing condensers need replacment from time to time. you may have a damaged ecu if you have electronic ignition.. hope this helps