Which carbs are these?

Title say it all! 1982 KZ 1000 LTD

Mikuni BS34

To add to WG's post, they are CV or constant velocity carbs. My manual says they can handle changes of altitudes like fuel injection and I guess don't need much jet changes

yup those look like me bs34's but what is the hose off of the top the carbs????? i believe its just an access for syncronizing correct? mine just have sleeves over them.

Geesh... constant velocity carburetors are far more fussy about needing to be rejetted for altitude or airbox/pipe changes. Altitude=Fuel Injection? HUH?

The hose on the #4 carb vacuum fitting is connected via a tee to the one on the #1 carb and those connect to the vacuum switch which opens the reed valves on the valve cover... emissions control stuff.

No WG, I meant they sense vacuum and adjust to which fuel/air mix you need at different altitudes, the mechanical way to how cars today sense how much air comes in the intake and matches the fuel to it. I am trying to make the point but I don't know if I did yet.

wiredgeorge wrote:

Geesh... constant velocity carburetors are far more fussy about needing to be rejetted for altitude or airbox/pipe changes. Altitude=Fuel Injection? HUH?

The hose on the #4 carb vacuum fitting is connected via a tee to the one on the #1 carb and those connect to the vacuum switch which opens the reed valves on the valve cover... emissions control stuff.

So tell me- can I run pods on it without screwing up tuning too much?

Yes, you can run pods. You need to rejet. If you look on the side of the jet needles, I can take a guess as to how to rejet. Some of the 4xxxx jet needles are real rich compared to others in both the 4xxxx and 5xxxx series. The richer jet needles require #130 mains for pods plus #40 pilots (type BS30/96). The rest of them require #140 mains and #40 pilots. I only mention this because I think Canadian models have the richer jet needles but can't say for sure. I suspect your j bike could be a Canadian model?

wiredgeorge wrote:

Yes, you can run pods. You need to rejet. If you look on the side of the jet needles, I can take a guess as to how to rejet. Some of the 4xxxx jet needles are real rich compared to others in both the 4xxxx and 5xxxx series. The richer jet needles require #130 mains for pods plus #40 pilots (type BS30/96). The rest of them require #140 mains and #40 pilots. I only mention this because I think Canadian models have the richer jet needles but can't say for sure. I suspect your j bike could be a Canadian model?

I will have to research it- it could just as easily be a japanese/euro spec bike up here, I would have to see what dealership it might have been sold at in time- the Kawi dealer here "back in the day" didn't always get American spec bikes, we frequently got Euro or Jap spec bikes- like the japanese spec Z1 that is actually a 750? IIRC. We have a few of them,

on top of that, we have military dudes bringing what would normally be "grey market" bikes here.

The Japanese model that is the same as the Z1 but is a 750 is a Z2 (not a Z1).