Question about Suzuki GS 650 G Katana Motorcycles

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Carbs are rebuilt and gas tank was acid washed to remove rust but the overflow steel tube in side the tank rusted thru and now you haft to plug the bottom of the plastic overflow tube to prevent the fuel from running out. That all being said it runs perfect up to 70 and then bogs out producing no power after that. I think the wires and plugs are good. I don't think that tube is for air flow but I could be wrong. It's a 2002 suzuki katana GSX 600F. Thanks for any help.

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Yes it is for air Need to have vent Drill a little hole TRY that MOPAR KENNY

Posted on May 22, 2011


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Why is gas pouring from the vent line when I go to start it

You don't say what kind of bike or give any other details so I will go with the obvious stuff first, I am guessing you might not ride it often or let it sit up for awhile. Gas pouring from the vent indicates that a float valve is stuck or the needle valve or seat seal has dried up and has fuel being forced around them as the fuel pump pressurizes the carbs. It is dangerous to run the engine with overflow as you could have a fire so your remedy will require you to pull the carbs to fix the problem.

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I have a1996 model Gravely 16hp twin cylinder that has given no problems since it was new. I started to crank it today and it was hydrologic locked. I removed the plugs and left it clear itself out. Put...

1. If it has a metal tank, then it may have rust in the tank which is getting into the carb(s). Look in the tank and see if there is any rust at all. If it has rust then a tank liner kit should be installed like "Kreem". "Kreem" or other brand liner kits are sold at most motorcycle shops.

2. The carb could have trash or rust in it. Remove the carb inlet line and blow litely into the inlet hose.

3. It most likely hydrolocked because the carb bowl overflowed when the trash or rust made the needle and seat stick open. The rubber breather tube shot out most likely because the vapors in the crankcase ignited or there is to much oil and gas in the crankcase now. Once the carb overflowing is stopped, the oil should be changed.

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Not much you can do for this problem. The acid that attacks rust is phosphoric acid. and will be a starting point. IF the rust is flaky put some sharp edged pebbles in it and shake hard to help remove loose rust. (like sand blasting by hand). Use no other acids as they will attack the metal and not the rust. The stronger the phosphoric acid concentration the better. Can be obtained from large hardware stores as a rust converter.

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1 Answer

If I remove a yics plug from one side and prime with fuel, the engine will start and idle until prime is burnt. Why will fuel not flow. New tank, new peacock, rebuilt carbs, new gas

Hi, Burns193 always check fuel flow first to isolate the problem area otherwise the usual suspects are:
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2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
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11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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General tuneup guideline for 98 vt600 honda shadow

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1 Answer

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1. If it only runs in the pri position, that means that the petcock small rubber line is not connected to a vacuum port which is normally in the engine side of the carbs. If you unplug the fuel lines at the petcock and place a vacuum on the smaller rubber line (coming from the petcock)using a hand held vacuum tool or your mouth, the petcock should flow gas each time a vacuum is created and stop when the vaccum stops. If the petcock does not stop flowing gas when the vacuum is released or does not start flowing gas when a vacuum is applied, then the petcock needs servicing or replacing.

2. The fuel is still spilling out because the float is sticking or out of adjustment, or the needle&seat has trash/rust in it or the needles&seats are bad. The float should swing freely on its pivot shaft. The needle sometimes has a spring loaded plunger in top that should freely move back and forth when pressed with the finger and if not replace it or free it up. Setting the floats will vary with manufacturers so consult you service manual for the proper procedure. If the floats are set too high, gas will continue to come out. Some floats have no adjustment.

3. If the tank has rust in it, replace the tank or put a rubber liner kit in it so that it ceases to release rust back into the carbs. Filters will not normally stop rust so the tank needs to be free of rust or fixed with a liner kit.

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1 Answer

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My issue with my bike is constant fuel overflow, even after the bike is shut off fuel keeps running out. A little back history. The bike has sat for 26 years in a shed. I took the carbs apart and cleaned...

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1 Answer

Hi I have a 1982 Honda 650 nighthawk and I need to have carbs rebuilt.If a needlevalve is stuck would it cause gas to poor out to the ground

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