KZ1000 Fours '79-'80 with Mechanical Slide Mikuni VM28 Pumper Carbs

This is the KZ1000 second gen carburetor. These VM28 Mikuni carbs will have a accelerator pump mounted to the #2 float bowl, and came in a variety of versions. It is imperative to ID these carbs correctly. Also, they ALL will physically fit one another. This makes it very common to have a set from another model and even includes various race carbs like 29mm,33mm smoothbores, 34mm Mikuni Flatslides, and sometimes even GS750-850-and GS1000 carbs. If you properly ID the carbs before servicing, the issues will be almost non existent. I have seen a few nightmare carbs that have combinations of various versions too. I have spent a long time getting these carbs strait and have rebuilt a huge amount of them, and it is RARE for them to be virgin.

Pictured below is a KZ1000B3 LTD '79 1089 with no vacuum nipple and a set of KZ1000E2 Shaft '80 1205 that have the vacuum nipple on the #3 carb. Another difference you will notice is one carb uses both diaphragms on the #2 float bowl and the other only uses the square one. It is much more common to see the single diaphragm style. The triangular diaphragm that is sometimes missing is called the sensor. It simply disables the square diaphragm from pumping when no vacuum is present. The easiest way to initially tell a '79 from a '80 carb is the air/pilot screws are on the bottom of the '79's and they are on the sides of the '80's. There are many other differences and it is very important to know the exact set your rebuilding and what parts it uses.

'79 KZ1000A3 MK2---------------------------------1131
'79 KZ1000A3A MK2-------------------------------1131
'79 KZ1000B3 LTD---------------------------------1089
'79 KZ1000C2 Police------------------------------1066 and 1201
'79 KZ1000E1 Shaft--------------------------------1098
'80 KZ1000A4 MK2---------------------------------1201
'80 KZ1000B4 LTD---------------------------------1202
'80 KZ1000C3 Police------------------------------1066 and 1201
'80 KZ1000E2 Shaft--------------------------------1205
'80 KZ1000D2 Z1R----------------------------------1204

KZ1000B3-79-1089 KZ1000B3 LTD '79 1089