Zzr 600 carb probs

Your float is sticking just had the same prob.I purchased a carb rebuild kit and it solved my prob.

bad coil

How long has the bike been sitting? Sounds like the carbs may be gummed up,and in need of a professional cleaning,and re-synchronizing.

The fuel system needs cleaning. Remove the carbs and petcock and clean them both out. The carbs have plugged jets which cause that. If you are not sure of how to properly clean out the carbs, I recommend that you take them to a shop or someone who knows how to.

There are 2 pipes one is the fuel supply the other is a pipe to create
a vacume to feed the carbs .

Sounds to me that the float may be stuck in the raised position for that carb. This will keep the needle vavle closed preventing fuel entering the float chamber. has the bike been left in the garage for a while on its side stand if so that might also indicate that the float pivot pin is worn and as the fuel evaporates the float has jammed against the side of the float chamber. Carb cleaner slight tapping of the side of the carb float chamber and possible a squirt of compressed air. All worth a try before a massive strip down. Jim ex heli-mech.

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.

Problems like these can be the most difficult to diagnose- especially when not in person.
Time is not a factor when it comes to water in fuel. Water can condense in a tank in just a few weeks or you could have pumped it directly from a filling station.
Its easy to check for water in fuel... Get a clean container, preferably clear or white in color ( makes it easier to see contaminates/ water). Shut the petcock off or if its vacuum driven turn the petcock to on. remove the fuel line from the carb end and place in the container. turn the petcock on or to PRI (prime) and let some fuel flow into the container. Shut the fuel off and let the container sit undisturbed while you reattatch the fuel line to the carb and secure.
Now look into the container. Fuel floats on water. if you see little bubbles on the bottom of the container or a distinct seperation line in the fluid in the container then you have water in your fuel. You will neeed to drain your entire fuel system including carbs and tank and replace with fresh fuel. Maybe run a bit of sea foam through your fuel system to remove the remaining water. If you are lucky you can get by without removing the carbs and cleaning them.
If the fuel is good then you may be looking at an ignition problem.

It sounds like your bike has been sitting in storage for an extended period of time (a year or more) - and the carburetors are plugged up. If this is the case, they will need to be completely disassembled and cleaned out.
If it hasn't been sitting (and the carbs aren't plugged up) then check that all of the normal tune-up items have been performed, especially valve adjustment, oil and filters, spark plugs, etc. If this fails to produce positive results, perform a compression check on the engine. Each cylinder must be able to produce at least 140 psi of compression in order to run and idle properly.

The spec sheet doesn't say if your model has fuel injection or carbs. Assuming carbs, disassemble and clean them. You will want the shop to balance and sync the carbs as well. This should get you back on the road in style.

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