TOPIC:

I'm going to buy aftermarket carburetors to inprove a little bit the performance of mine 1982 KZ750E, i've seen the Mikuni RS 34, someone have already install they? What's your opinion?
Othervise do you have some suggestion about other models/brands fitting with this bike?

There was a thread here recently where this same question came up. The answer is that RS34's are way to large for a 750. Mikuni BS34's would be better. They came stock on a bunch of 1000cc bikes so they will flow plenty for a 750.

34mm is too big.
What other mods do you have as fitting bigger carbs like those to a stock motor will be a waste of money and won't work as you expect.
26mm to 28mm Mikuni VM slide carbs from a stock 900 or 1000 is a more sensible move and will bolt straight on with the correct boots.
These will be able to deliver more than enough mix than your motor will need.

Whats wrong with your 750 carbs, not worth for a rebuild???

No offense intended, but before you try using different carbs I would urge you to first see how well your bike performs today. If it is not delivering the performance you expect there is most likely something other than carbs that are the problem. Notice in the road test shown below the stock KZ750E ran the quarter mile in less than 12.3 seconds –that’s pretty quick. If you bike doesn’t run that quick I suggest there are many areas you should look at before worrying about changing the carbs. If, on the other hand, your bike already runs that quick there’s a lot more than just swapping carbs needed to make it run much quicker. Ed

The CV carbs on the E were adequate carbs but the choke spring design was horrible. I personally prefer mechanically actuated carbs for the throttle response, so I would go for the 28VM carbs as per Zed's suggestion. either that or get a set of ZR750 carbs.

the big problem with the carburetors of my bike is that some of the previous owners tried to restore them badly, therefore they have several damaged parts.
So I wanted to know if there was something easy to find aftermarket and while I was, of course, that helped me increase performance or otherwise had mechanical drive (for now I have not made any other modifications to the engine, I only have an open exhaust) .
So I imagined that the 34 were too big, but looking on the websites of the various carburetor manufacturers I did not find any indication for the kz750, except on the Mikuni site that indicated the rs34 as compatible.
And what's more, having a look around they also seemed to have more affordable prices than others.

TOPHAM Germany listed a brand new Mikuni TMR 28 set for the Kawasaki 650/750/900/1000 bikes but it´s a little pricey!!!

zed1015 wrote: 34mm is too big.
What other mods do you have as fitting bigger carbs like those to a stock motor will be a waste of money and won't work as you expect.
26mm to 28mm Mikuni VM slide carbs from a stock 900 or 1000 is a more sensible move and will bolt straight on with the correct boots.
These will be able to deliver more than enough mix than your motor will need.

I'm going to follow your suggestion, and now I'm searching for a vm26/28 carbs set.
Do you kmow what's the difference between VM28SC and VM28SS series?

Don't go for the SC carbs.
They are the early Z1 with 2 bolt tops and have an inferior linkage, don't keep balance very well and will be more expensive because the rivet counting restorers want them.
It's the SS you want with the 3 bolt tops.

zed1015 wrote: Don't go for the SC carbs.
They are the early Z1 with 2 bolt tops and have an inferior linkage, don't keep balance very well and will be more expensive because the rivet counting restorers want them.
It's the SS you want with the 3 bolt tops.

Do you know if the part number 16001-1205 corresponds to a VM28SS?
It comes from a KZ1000, do you know if it is suitable?

I haven't got the part numbers in front of me but carbs from a 1000 will either be 26mm or 28mm SS.
The SC were only on the Z1 900's.