I have a ninja 2003 636. I need to remove all the gas

buy the bulldog door lock kit. this kit has all items to unlock automotive doors of all types. the kits also come with a key for locking gas caps. it works on all types of locking gas caps, even the locking gas cap on a motorcycle tank. i have used this key on honda, yamaha, kawasaki, and suzuki.

http://www.repairmanualclub.com/motomanuals/

ur fuel filter is under your gas tank. remove the tank and follow the line that u disconnected from the tank there should be a plastic covered filter and that is ur fuel filter

usually from the vent or the seal. it's a common occurense on many bike. best thing to do is not park in direct sunlight.

It sounds like that hose which runs fron the cap area (inside) the fuel tank to the back bottom is broke, if you take it to a Kawasaki dealer and have your dealer call Kawasaki there is a good chance it will get covered as long as the tank is damaged. Those hoses (metal) that run inside the fuel tak sometimes crack, there is really not way of fixing them unless you cut the tank open and then you would need to reweld it.

There are two bolts at the top of the tank and two under the front of your seat. Oncec removed the tank will easily lift off. The tank will have to be turned at an angle to pass the tank switch by the frame.

take the tank off the bike and drain it take the petcock where fuel comes out of the tank off there is a screen filter in it clean replace clean fuel then try it again

I would start off by removing the fuel tank, I would then remove the line from the tank to the carbs and lightly and gently blow air from a hose into the carbs, this will free up any dirt or trash that may have gotten into the carbs.