Identification crisis

I recently bought a 1977 kz1000ltd. Doing a little carb work and tune up. I have read a lot of post on here and helped me a lot, but could someone tell me what carbs I have and are they stock on my ltd? Thanks
Dan

EDIT -- Oh, Wait! They are indeed Mikuni 29mm smoothbores -- not stock 26mm Mikuni. And I happily stand corrected!

Good Fortune!

You are a lucky man. Those are 29mm smoothbores.
Worth the price of the bike nowadays
No they are not stock. After market upgrade.

Wow, any tricks to tuning them?

moneypit wrote: You are a lucky man. Those are 29mm smoothbores.
Worth the price of the bike nowadays
No they are not stock. After market upgrade.

Nailed it the little square on the right side tell's the story.
Ment as a road race carb so they don't really idle good and can be
APITA to tune for street riding but WFO I love mine.

As much as I love the feel of a kz 1000 at wfo, most of my ridding is just crusing around these old Arkansas country roads. Guess I'll be on the look out for a good set of stock 26's for my ltd.
What are these 29mm's worth anyway? Thanks for the info.

I had no trouble tuning mine. Ran like a top, more power. Prices vary from 450-700 bucks on fleabay
Trade ya my old 26 s for them

I'm running mine on a stock GPz750 motor
not a big four like you guy's..
My little motor don't send as stong an idle/off idle
signal with the big carb's and that's made that part
of tuning them a pita for me.

Ok, I'm going to try the 29's again. Here's what happened. When I bought the bike the po told me it had a 1075 kit 4000 miles ago. It had a 4 n2 1 w/no baffle and K&N pods. I put the stock ltd exhaust back on it (I really like stock) and it would bogg at wot until the rpms got up around 8 grand or so. Then I got a stock air box and installed it. Now the trouble begins. It wouldn't rev past 4 thousand rpms period. I took the air filter out and it was eh. (Anew clean filter) pulled the carbs checked the jets main- 122.5. Pilot 120. And btw adjusting the air mixture's made no difference. I pulled the carbs and installed 120-mains and 117.5-pilots . It's better. The plugs are burning nicely. Do these carbs like the pods and header? And O, it never has idled like id like for it to. That's why I was thinking about a set of 26's. Any help ?
Thanks

without a dout those are 29s the best of the best
not even a stock item back then they were special order
ive run em and once theyre set up there great for a streetable track bike better then CRs imho

BE CAREFUL when playing with jet sizes if you over tighten them youll fuck em up lets hope this isnt already the case

the 29s like velocity stacks or pods theyre a aftermarket carb they also like a LOUD scavenging pipe they a great performance carb but as you say the 26s are a great street carb as well so easily tunable and offer good low end torque which is quite fun on the street 29 pumpers where the ultimate back in the day but nowadys i like the rs36 pumpers on my carberated machines

Whome wrote: ... going to try the 29's again... adjusting the air mixture's made no difference. I pulled the carbs and installed 120-mains and 117.5-pilots. It's better. The plugs are burning nicely. Do these carbs like the pods and header? And O, it never has idled like id like for it to. That's why I was thinking about a set of 26's. Any help ?....

120 main jets and 17.5 pilot jets should be okay (could also experiment with size 20 pilot jets) and according to Z1E, later versions use size 25 pilot jets.
www.z1enterprises.com/Z1CarbGuide.aspx
Scroll down to the 29 smoothbore info and then scroll down further to the chart.

Where adjusting the pilot air screw produces no discernible difference in rpm, it's likely that the pilot circuits are not perfectly clean. It's important that the orifices are clean and clear where the pilot circuits exit into the carb bores.




It's also important that the air jets BS30-97 are clean and clear.




Properly set up, the 29's will produce a strong and steady low rpm idle, and very acceptable everyday street-riding performance, with no extra maintenance requirements, at least with the stock air box and reasonably free-breathing 4>1 exhaust.

However, the stock KZ900 26mm Mikuni carbs are likely the most user-friendly carbs on the planet.

Good Fortune!

You guys rock. Thanks for the info. It will probably take me a few days but I will post the results.