gpz 550 H- tk 26 carb ...or not??

hi everyone. i was just wondering if on a stock gpz 550 H engine (1983) i can use some keihin carburetors with semi flat slide diaphragm and without those damn plastic plugs on the jet hole.
i was thinking about a rack of standard keihin CVK ..
experience? advices? from what bike i can take the carbs? :laugh: :laugh:

maybe gpz 600 r carburetors ? i can't find offset and diameter of 600r carbs. someone know about?

Seems like a lot of hassle and modding for a small (possible) benefit. What's wrong with the stock carbs?

Even if the spacing is close, the ZX600 carb holders may not work.

Alternate carburetors. probably the ZX550 gpz & ZR550 Zephyr models. not sure about the TK22 carbs from some of the other 550s as the gpz cylinder head may not be suitable for those. not sure. loudhvx may have the info on his motorcycle stuff page.

Nessism wrote: Seems like a lot of hassle and modding for a small (possible) benefit. What's wrong with the stock carbs?

Thanks martin.
The tk26 have that damn plastic plugs to block a passagge. In the years is very difficult to find parts for those carbs.
And i wanted to swap from cylindric to semi flat valves.
Softer diaphragms, adjustable needles and the possibility to try more jet sizes..
I wonder if someone have a zephyr 550 to take some measurement, what carbs are stock for the zephyr 550?

Tk27 carbs from a 84-85 Gpz550 (Zx550A), as Martin mentioned, should fit, using the same carb holders. Also, as Martin mentioned, the Zephyr (Zr550B) carbs should fit, but require different carb holders. But they are all round-slide diaphragm-CV carbs. They don't have the little plugs. They might have a different throttle cable.

It should be easy for someone with a small lathe to turn out a few of those plugs from aluminum stock... much easier than trying to retrofit a totally different carb, especially if you are using the stock airbox.

If you are looking for manual slide carbs, you can try to make some TK22 carbs work. They are round-slide manual carbs, but that would be a step backward in performance.

There are also some racing manual-slide carbs I've seen on ebay from time to time, but you are talking in the $400 - $600 range.

loudhvx wrote: It should be easy for someone with a small lathe to turn out a few of those plugs from aluminum stock... much easier than trying to retrofit a totally different carb, especially if you are using the stock airbox.
.

Amen. The BS Mikuni's used a rubber plug that could be shaved down if need be. There are ways...

Here are some... much cheaper than I thought, but it looks like racing only... not for driving around town, and you want to swap out the petcock.
newjersey.craigslist.org/mpo/5855225412.html

A little late to the show, but here is my experience.
My '85 ZX550 came with TK27 Carbs, and the TK26 fit in the same place, using the same throttle, cable, and intake holders. TK27's in my opinion, are easier to work on, and have less jetting than the TK26. I moved up to the CV30 carbs from a ZR550 on the then race bike, and had to change the intake holders to the ZR550 as well. The throttle and cables were changed to the ZR550, because the CV30 Carbs use a "push" and a "pull" cable set. When I added the Megacycle Cams, to go with the already 615cc and ported head, I moved up to the CV32 Carbs from a ZX600A/B/C up to 1992 Model. These use the same throttle and cables as the ZR550, and they also fit in the ZR550 Intakes. Because the CV32 Carbs have a larger inside diameter than the CV30, but share the same outside diameter, the Carb Holder Openings need to be opened up a little so there isn't a "step" from the carb to the holder opening. Motion Pro made me a custom Revolver Throttle Assembly with interchangeable reels. I am still using the CV32 and Throttle set up on my daily ridden GPz550.



If this is confusing in any way, take 2 aspirins, and reply in the morning.

I'm very late to this thread, sorry! But your response is on point for me. I'm building a '84 GPZ motor bored out to 615 cc using Wiseco big bore kit.
I'm trying to choose carbs - I've gone back and forth on Keihin CRs - they're way too expensive and don't have faith motor will run well with them.
I like your idea of the ZX600R CVK 32s - that sounds like a fantastic compromise between stock TK 27s and the CRs.

But, I have a chance to buy a set of CVK34s off a '87 ZX750F - Ninja 750R. Would those be too big for a 615cc motor from an air/fuel perspective (assuming I can otherwise fit them)?
Thanks!