자유게시판

Today was another hot day! !

There haven't been any evening showers around here recently, so the temperature is not dropping...

It seems like there are quite a few torrential downpours in neighboring Isesaki, Gunma Prefecture.

Anyway, today I'm working on the carburetor of a Kawasaki KZ900! !

I've lightly cleaned the inside once to check that the engine will start, but I haven't replaced any consumables, so I'm going to work on it.

The genuine carburetors from this era of Kawasaki are forced-open/close type, and they can be quite quirky.

By the way, the inside of the carburetor is often quite dirty.

The float chamber and other parts are sometimes cleaned, but I don't think they often work on the carb connection.

I'll remove it from the float chamber for now, but this part is in good condition! !

Inside the float chamber, there is an overflow pipe and a choke intake.

Check that there are no cracks in the overflow pipe, and make sure that the choke intake is properly pierced.

This is the float valve pin, but there was something like a nail in it.

The pin diameter is also not correct, so the float will move slightly.

Remove the float chamber and throttle valve, and disassemble the carburetor into individual units.

The inside of the carburetor is quite dirty, as shown here.

With the carburetors in this individual state,

we can finally start cleaning!!

And this is after cleaning.

As you can see, the dirty parts on the inside have also been refreshed!!

Of course, we check the alignment of each passage, such as the jets and nozzles, and finish off the four carburetors.

The float pin introduced above

was borrowed from a used carburetor we had in stock and assembled.

This is a forced opening and closing throttle valve.

The throttle valve is pulled up from the throttle shaft via a link mechanism.

When the throttle valve is pulled up, the negative pressure in the carburetor's venturi changes,

and gasoline is sucked up from each jet.

The carburetor is assembled by replacing each consumable part.

There are many parts that are not genuine, so kit parts are used,

but basically, jets and needles are genuine parts, depending on the condition.

These are the parts that were replaced.

Gaskets, parts around the float valve, O-rings, fuel pipe joints, etc. were replaced.

There are quite a few types of carburetor kits available now.

Basically, jets supplied by genuine manufacturers such as Mikuni and Keihin are fine,

but jets included in third-party kits are generally not used.