I have a set of carbs from a later 70's model kz900 I got from a friend. I was wondering if anyone could help me with identifying these. I can post a pic or email it, but basically I just wanted to know how to measure for the mm size and if any of the markings on it would indicate whether it was for certain models or not. I don't remember off hand what it says on them but I can get them out of storage and post it, if needed. Thanks for any help you may be able to give!
All carbs commonly used on the Z1/KZ's have unique things to identify them without having to do any measuring. The 3 commom sizes that came on 1970's Z1/KZ's are VM24's, VM26's, and VM28's. The 4th one you find is the VM29 smoothbores, used in many cases for racing.
the VM25's are almost only found on the KZ650's, but they are a cheap to buy rack of carbs and COULD be found on SOME 900/1000s and would surely have been put on by a private individual.
The VM24's are identified imediately from the lines on the carb bodies........ The first pic shows the lines in the carb bodies that identify the 24 MM carbs. Also note at the top center of the carbs is the idle adjustment screw.
The VM26's are identified from the smooth bodies..... The 2nd pic shows the smooth carb bodies int he black circles. The red circle shows the acceleator pump, found on some, but not all, VM26's. The blue circle shows the idle adjustment screw at the bottom of the carb. There is a chance you have these carbs, but they came standard on the KZ100's. the 26's also have a dual inlet fuel line.
The VM28's are identifed by the flatter carb caps and the fact that the carb tops are facing the induction side. All other KZ carbs have the tops facing the engine side..... The 3rd pic shows the flatter carb caps and rear facing of the bodies in the red circle. The blue circle shows the single inlet that is not in the center of the carbs. The black circle shows the off centered carb cable attacment. This is the most common set of carbs on the Z1/KZ 900's and a GOOD chance of what you have.
The VM29's are identified by the large hex head bolt ont he bottom center of the carb bowls and the lack of angled, brass drain screws... The last pic shows the hex head bolts in the black circles. This is the fast way to identify them without measuring the carbs. Also, these are the rarest and most sought after carbs, selling in the 350-600+ range. If these are the carbs you have, count yourself among the lucky and hold onto them like they are gold!!! If you have any other questions please ask.