I, need to connect all fuel, air, carbs, vacums, hoses, on a 1989 kawasaki 500 ex. when I got the bike all the hoses were in the wrong place, and need to place it all the correct way so I can use bike need some kind of pictures of or diagram to set all hoses on the right place. Thank you !

If the bike runs buy some Seafoam and add some to your gas. This works REAL well. I have a Kawasaki KLR650 and I swear by the stuff!

They are fuel overflow hoses, and just hang down under the engine. If they are not vacume or fuel lines, then they must be the overflow pipes, one from each carby.

Several things could be wrong. First, the fuel petcock (valve) at the bottom of the gas tank should be turned off when the bike is not being ridden. Also, it is possible the valve may not be fully shutting off the gas. This can allow the carb to overflow and leak gas. A stuck open or punctured float in the carb bowl can cause overflow. The float should be light as a feather and have nothing inside it but air. Is the carb securely mounted?

Check for cracked fuel hose or bad connections at the tank and carb. Is the fuel valve body leaking gas where it mounts to the tank? Heck, with the bike being 36 years old the tank may be leaking at a weld or due to rust through. I wish I could work on your bike. The older bikes are more fun to work on than the newer bikes. Post a reply and let me know what you find.

Didn;t say if a carb or fuel injection as both are fitted stock. The carb can be having troble with the cold starter valve either not closinfg all the way or it's o ring seal being bad. The bike is also bad about blowing the aircleaner housing away from the carb some and the problem can be even worse that you report. The fuel injection system can have too high a fuel pressure and do this and or the fuel pressure regulater could be leaking some. It'll run strong on the gas. and choke out as it idels down. Both will act this way with a vacume leak or the air filter housing loose. The fueler has a vacume hose that can fall off. Low compression and or cylinder inbalance ( compression good in one cylinder and not the other ) Cam timing wrong, Ingition timing wrong. These aren't as likely as the air filter house getting a leak

Well there only one way the fuel can get into the crankcase and that's from the fuel tank. The petcock must be draining and the float needles are not stopping the fuel flow. Do you have a prime position on the petcock? If so do not run the bike in the position. Try topping the tank off with gas and letting it sit for a while and see is the gas has gone down and then check the crankcase and see if there's fuel in it again. i still say its got to be your petcock.

This should help alot.

you have to remove the tank. leave your fuel selector on. no fuel will escape when you disconect the hose from the tank. remove the four phillip head screws facing th front of the bike. slide out the air filter. you may want to change or clean the plugs while you have the tank off.

I have an 89 Katana and don't know where the two vacuum lines on the top of the carbs go