Hi i got a zzr 600 im not geting fuel to carb 2 or 3 and no fuel in float chambers but runs on 1 and 4 for a bit thans terry

I have a 2001 Sukuie Morauder 800. I have had leaking gas under the motor. The rubber tubes from the gas tank to the carubater needs to be replaced. With age the gas wareouts the rubber on these tubes.

Has the bike been sitting up for any length of time? Sounds like the needle/seats are sticking (they regulate the flow of gas into the float bowls of the carbs).. a full float bowl will last about a mile or two..then you run out of gas.. then. if you let it sit.. they slowly refill.. (add choke).. and it will restart and repeat this over and over..if this sounds right... have the carbs professionally cleaned/checked and calibrated!!
Have you checked the petcock to make sure its flowing gas freely to the carbs?

The carb is flooding because of a stuck needle valve in the float chamber. When the bike is running at higher revs, it is probably drawing enough fuel into the engine to run OK, but at low revs, the overflowing petrol will be getting into the engine in far too higher volume and flooding the cylinder, drowning the spark plug.

You will need to remove the float chamber from the carb, take out the pivot pin that the float hinges on in order to release the needle valve and clean it out. 99% of the time simply dropping the needle valve out, giving it a wipe with a lint free cloth and flushing a little clean petol through the inlet pipe to dislodge any obstruction will fix the problem. While the float chamber is off, check that there is no dirt in the bottom and that the entire chamber is clean and free of any muck.

There will probably be a drain valve on the side of the carb (Usually a brass screw set into the base of the carb float chamber at a slight angle). Before you go to the trouble of removing the carb from the bike, try this:

Turn off the fuel supply.
Put a cup under the carb to catch fuel.
Remove the drain plug and allow the fuel in the float chamber to run out.
Now the float is sitting at its lowest possible position inside the float chamber, turn the fuel supply back on and as petrol runs out of the drain hole, tap the carb sharply and repeadedly with the end of a screwdriver as you let about a pint of petrol flush through.
Turn off the fuel supply and replace the drain plug.

The flushing and tapping MAY dislodge the obstruction that is holding the needle valve open and fix the problem without having to remove the carb

Hi,
That means you only adjusted the float and did not check the needle stopper/valve that stops the fuel flow going into the fuel chamber.
Check the valve if it needs to be replace or some dirt might hampers the sealing of the needle.
PLEASE DON'T USE SILICONE ON CARBURETOR( silicone dissolves when mixed w/ gasoline )!
Use a 3bond sealer.
Hope that helps you out!

Hi,

The problem would be the gas float stopper in the carburetor. Fuel kept on flowing even when the gas float chamber is already full.
Better open the carb and check the float valve if it stops the flow of fuel when the float chamber is already filled.
Your mechanic or you can adjust the pin stopper by moving /adjusting the float pin seat.
Hope that helps you out.

Thanks for using FixYa!

Inside of the carb is an inlet valve. Works like a toilet, with a float rising as fuel enters the float chamber..

Yes, is can be dirt, or a sunk float( meaning float absorbed fuel, and now wants to sink).

You need to remove the carb, and open it up to resolve this issue.

sounds like a carb or carbs are clogged need to have them cleaned and synced
may also want to make sure you have spark at all 4 cylinders

bad gas possibly?-just a thought