Question about 1978 Suzuki GS 750 E

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Bike turns over but wont start

I replaced plugs wires, cleaned carbs and the bike just keeps turning. any solutions. it was running a day before but had no power thats what made me clean carbs!!!

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Check needle setting and flote setting in carb



hope this helps

Posted on Jun 17, 2009

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Drain the carb floats and clean with Seafoam. Gas breaks down after about 6 months and the ethanol in the gas coats the carb.

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drain the carbs out so they fill with fresh fule and retry starting the bike if that still wont get you going wip out the plugs and tip a cap full of fule down each plug hole replace the plugs and give that a try it should at least try to start after this,,,it could be that the pistons are dry or the jets in the carbs are blocked up,,if its the carbs jets blocked up turn off the fule drain the carbs and fill the carbs with carb cleaner let that stand a day or so then drain the carbs and fill up with fresh fule,,,to restart the bike,,,

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Don't do the gas down the spark plug thing. It's a bad idea. Do the following >
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side or bottom of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

Please rate this solution. Thanks!

May 25, 2009 | 2005 Gilera Runner VX 125

1 Answer

Bike turns but wont start


more info needed.. is there compression, does it have spark, can you tell if its getting fuel. are the plugs wet with fuel?

May 22, 2009 | 1978 Suzuki GS 750 E

1 Answer

Hard start, trouble idleing


Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install new stock spark plugs. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. This process should get you back on the road.


Please rate this solution. Thanks!

Apr 01, 2009 | 2004 Harley Davidson XL 1200 R Sporster...

1 Answer

Bike wont start


First thing > install a new set of the stock NGK spark plugs for your bike. Check for spark before installing. If no spark, then check to be sure the battery wires are clean and tight. Is the kill switch on? Is the side stand up? It should be up when starting. Is the bike in neutral? Check the fuses. Check the wiring connections, are they tight?

If spark is present, is the gas turned on? Clean or replace the air filter. If the bike still will not start go ahead and drain the
carbs. There should be a screw on the lower side of each carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carbs to fill with gas. If the bike doesn't start properly then shut off the gas and remove the carburetors from the engine.

For both
carbs > remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.

Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together. Remount the carbs.

Next, remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Turn the gas back on to let the float bowls fill then start the engine. Be sure to balance and sync the carbs when finished. If you don't know how to balance and sync the carbs, get back to me after you do the stuff mentioned above. This process should get you back on the road.

Please rate this solution as " FixYa " if all goes well. Thanks!

Mar 28, 2009 | 2008 Harley Davidson VRSCAW V-Rod

1 Answer

No spark, when it was running it would rev funny at random times. Now wont start. Does anyone have wiring diagrams? or a solution?


Not as much info in the posting as I would like so I will provide a broad answer.

First thing> install a new set of the stock NGK spark plugs for your bike. Check for spark before installing. Still no spark?
How good is the battery? Is the battery nearly full of water as it should be? Are the battery wires clean an tight? Is the kill switch on? Is the side stand up? It should be up when starting. Is the bike in neutral? Check the fuses. Check the wiring connections, are they tight?

If spark is present, is the gas turned on? How clean is the air filter? Clean or replace the air filter.If the bike still will not start go ahead and drain the carbs. There should be
a screw on the lower side of each carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carbs to fill with gas. If the bike doesn't start properly then shut off the gas and remove the carburetors from the engine.

For both carbs > remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.

Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together. Remount the carbs.


Next, remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Turn the gas back on to let the float bowls fill then start the engine. Be sure to balance and sync the carbs when finished. If you don't know how to balance and sync the carbs, get back to me after you do the stuff mentioned above. This process should get you back on the road.

Please rate this solution as " FixYa " if all goes well. Thanks!


Mar 28, 2009 | 1978 Yamaha RD 250

2 Answers

Bike wont turn over


I have a 1996 cbr 600 f3 and when I first bought it used it would not turn over for the life of it. It turned out that a major problem was the spark plugs needing to be replaced. Thats the first thing to do. Next clean out those carbs with some good carb cleaner.

Nov 10, 2008 | 2005 Honda CBR 600 F

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