Question about 1982 Suzuki Gs 550 L

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The engine starts only running on rt 2 cyl checked for spark it's ok the bike has been sitting for 2 yrs we change the fuel as soon as it's given gas it shuts off

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Typically, when a motorcycle sits for more than just a few months, the gasoline in the carburetors evaporates and leaves a bunch of varnish behind. On motorcycle carbs, the jets and internal passageways are small enough to become clogged. What needs to be done is to have the carburetors completely disassembled and cleaned. This will restore the engine to correct operating status.

Also, just to be safe, make certain that the engine's compression is sufficient for proper operation. Each cylinder needs to have at least 140PSI of compression. Check this before you go through the trouble of rebuilding the carbs.

Posted on Sep 30, 2010

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Your going to need to remove the carburetors and clean them.The jets in the carbs are pluged up with dried fuel.Hope this helps you out.
D.

Posted on Sep 30, 2010

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Spark to plugs is great?.....but if they are black (carbon coated) it may not start.
Crank her over and use that choke for 30 seconds.
Pull the plugs ...are they wet with gas?Smell it....is it water or gas.
They should be wet with something.
Are they dry.........No fuel.

If they are wet with gas and NOT black carbon coated and you are SURE you have spark..........time to tow it to start.
You want to turn the engine fast enough to have the crank throw oil onto the cyl walls. Engines need a oil coated cyl wall to run....to seal the rings.The gas from flooding the engine washes the oil away.Put it back and it should fire up.After the first start...it should be OK.
I've started many a engine that others could not start (flooded or sitting for years) with a little oil in each cyl to seal it.....but towing is the better choice if possible.

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You need to drain all old fuel out of the fuel tank, the fill with fresh fuel, clean or change filters (air and fuel)
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Your bike needs 4 things to run-Fuel, Spark, Air and Compression. One or some of these are missing.

1) Crank engine over several times to start. Remove spark plug. If plug is wet and smells like gas then it is getting fuel.

2) Check for spark
Put spark plug back into spark plug cap and lay spark end along side bolt or part of unpainted head making contact and crank over engine as if to start. If no spark then is electrical problem. Try changing spark plug. Check grounds. If not plug or grounds then purchase a shop manual from your local dealer and ohms test all electeical componet resistances as shop manual instructs. Be sure components do not meet specks before purchasing.

3) If has spark and plug was wet upon removal then gas has water or just old gas. If you drained the carb via bottom of carb screw into a clean clear container and see stuff at the bottom then carb is dirty with water and or dirt.

If your bike has been sitting along time condensation will build explaining water and or gas will loose its kick after sitting too long. If you think it has been sitting a long time it is best to dispose of old gas and refill with new. Water can also get into tank from gas can when fully tipped upright so dont dump every last drop into the tank...most ofter the last couple of cups are water.

If bike has been sitting for a few days and was running fine before that, turn off gas, drain carb via bottom of carb screw, close off screw and turn gas back on. This will refresh the gas in carb.

If none of these are the case and you have good fuel, good spark...check air filter for air flow. If all this is good then you need to do a compression check. A simple way to do it is to stick your finger in the spark plug hole and hold it in there with some force and have a friend try to start the bike. If it blows your finger out then it has compression. If it doesnt want to force your finger out then you have no compression and is a piston and ring problem. The only way to test compression for sure it to purchase a compression tester from auto parts store that has an adapter for your size plug hole and do a proper test. I hope this helps.

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