Question about 2002 kawasaki ZX-6R

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My 1994 ZX6R with 5k miles is getting spark at all 4 spark plugs but when I spray carb cleaner in the carbs while it is running the one on the far right the front brake side the engine does not rev up the other 3 it does, the bike sat for 3 years but I changed the oil and put fresh gas in it and am running it off of a remote fuel tank now trying to get the one cylinder to work like the rest?

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  • kawasaki Master
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You will need to check the valve clearances and then do a compression test, a valve may be corroded slightly open. If it has a really wide clearance it is probably stuck open.

A quick fix without removing the head may be to make sure the piston is down on that cylnder, remove cam , and push or tap valve lifter to try and free it,

Posted on May 05, 2010

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Posted on Jan 02, 2017

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My Troy Built 5550 generator will not start. I changed the spark plug and oil. The pull cord does not crank the engine. There is a on/off switch, choke and still no spark. The engine is a Briggs &...


The first thing to do is to check and see if it is getting any spark to the plug.
To check for spark, remove the spark plug wire from the spark plug.
Remove the spark plug from the cylinder.
Attach the spark plug wire to the spark plug.
Using insulated tools so you do not get shocked, hold the base of the plug to the bare metal of the engine.
Crank the engine and observe the plug for spark. There should be a bright blue spark jumping the gap of the spark plug.
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If not, we need to look at the ignition system.
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As gas gets old, it turns to varnish and clogs up the passageways inside the carburetor, not allowing enough gas to get to the engine.
This condition is cumulative. Every time gas sits, the varnish builds up just a little more, like coats of paint, until eventually gas can not flow. It will not happen overnight, but the symptoms can show up all of a sudden, even while simply stopping to refill with gas.
The use of fuel additives, such as Sta-Bil or Sea Foam will not stop this process from happening. They will greatly slow it down, but the gas will still go bad.
When this happens, either the engine simply will not start, or it will not run without the choke on (this reduces the amount of air getting pulled into the engine, changing the fuel/air mixture), or it will run but surges.
Another issue that varnish in the carb can cause is that the varnish may not allow the float needle to seal properly against the seat, causing the flow of gas to not shut off when the bowl is full. The result will be gas overflowing the carb and running into the cylinder, and possibly out the air intake. If the gas gets into the cylinder, it will seep past the rings and down into the crankcase. This will be evidenced by your oil level being over-full and/or the oil smelling like gas.
The only 2 solutions are to either replace the carburetor or give it a good, thorough cleaning.
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Most people believe that cleaning a carb involves removing the bowl and wiping it out, then spraying some carb cleaner through it.
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To properly clean the carb, you must remove it, disassemble it (making sure to remove all non-metal parts), and soak it in a commercial solvent for several hours. Soaking it overnight is even better.
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if it didn't try your valves could be out of spec. to tight and your losing compression. try the carb cleaner and let me know
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1 Answer

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Hi and welcome to FixYa,

Offhand would suggest a rebuilt/clean of the carbs. A temporary workaround would be to switch off the fuel petcock, remove the fuel hose, partially drain the carbs and spray into the fuel hose (going into the carbs) injector/carb cleaner. Reinstall fuel hose, turn on fuel. Remove the air filter and start the bike. After warmup, rev while spraying injector/carb cleaner into the opening where the air filter should be. Get a hard paper/board (such as a folder) cut to a size bigger than the air filter but would fit inside the opening of the airbox. Rev/pump the bike slowly building the RPM at about 4~5K suddenly cover the opening (with the board) to fully choke the carbs while maintaining throttle. Before the engine dies, remove the cover. Spray again while revving. Repeat choking/spraying several times. The idea is for the vaccum to draw the clog/blockages.

Pls post back result(s). Good luck and Thank you for using FixYa.

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