29 smoothbores

I found a set of supposedly 29 smoothbores from a friend and have a couple of questions. How can I tell what they are?, are there any numbers to check? I plan on putting them on my 77 1000. Thanks for any help.

where is the Z1E carb info section? I will try and get some pictures up...isnt there a number under the choke or something?

first check is the easiest they have a 17mm headed drain plug on the bootom of the float bowl.

The early Z1 28mm carburetors are best identified by the combination of 17mm drain plug directly under the main jet,

Mikuni 29mm smoothbore carbs

The top of the carb is identical to the 26mm (and later KZ1000 28mm) carbs. The float bowl went back to using the 17mm drain plug directly under the main jet. Great for racers as it allowed for quick changes of the main jet. None of the VM29's have an overflow pipe fitted in the float bowl.

l Note: some very early sets of 29mm smoothbore carbs have a float bowl with a small drain screw angled to the side.

the zi 28mm carbs had two screws holding down the top caps the 29 smoothbores look very similar to stock late model carbs [26 or 28mm] three screws in the top cap. the 29's are the that have the 17mm drain plugs

I found a set of supposedly 29 smoothbores from a friend and have a couple of questions. How can I tell what they are?, are there any numbers to check? I plan on putting them on my 77 1000. Thanks for any help.