All fazers have it, the Carburetors are heated by flowing coolant through the carburetors (different circuit to fuel and air) to prevent what is called Carburetor Icing in cold damp weather, which would effect the cold running at idle to 1/2 throttle.
It happens when there is damp cold air (below 4C) and the water vapor freezes going through the carburetors.
If you look closely at the front upper of the carbs on both sides you will see black hoses attached to the outer two.
They go to the rear right side radiator (Small pipe) on the and thermostat housing under the tank.