1980 Suzuki Gs 550 L - Answered Questions & Fixed issues

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

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.

sounds like a vacuume leak

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!

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

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.

Check the starter button it may be full of carbon, remove it and clean wth a 400 sandpaper or better replace it.Hope this helps

When you say it won't rev past 6k what happens? Does it bog down and eventually choke itself out?sounds like the carb needs a good cleaning. Have you replaced the fuel and air filter? If you take the air filter off does it run better or worse?

are you sure you don,t have a shut off , should be on the left or right side under fuel tank , if you do need one go to any motorcycle shop ,be sure to get one with a off , on , reserve , the reserve is for when you run out of gas in the on position flip it to reserve and hope theres enough gas to get you to gas station