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'86 GT550 31mm carbs airbox identification
- Z550tim
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recently i bought GT550 which is also called Z550G3 model, although in running condition it has several issues i want to sort out, like cleaning, adjusting, replacing fluids, leaking exhaust etc.
I pulled the whole airbox and carbs out, and realized my new rubber adapters between the carbs and airbox are too small, although part numbers 11015-063 and 11015-057 are correct for this model.
So one of the previous owner (there were must have put some different carbs (31mm) and airbox setup, since the stock carbs should be 26mm for this year model.
Here are the measurements, i also attached pictures:
carburetors: 31 / 36mm engine side, 46 / 50mm airbox side. TK CV V073 5B12
airbox: 52mm holes
Please help me with identifying this setup, as i don't know what parts to order, I'm searching the net since a couple of days and have no idea, its actually my first Japanese motorcycle. The only experience i have is with vintage European bikes from 50ties, much less complicated. Thanks for any input.
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- JoHNY
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Kawasaki Z750P7 Spectre, Triumph Daytona 955i, Honda CBR1000FN
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- Z550tim
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JoHNY wrote: Were they not fitted when you pulled the carbs?
Yes, they were on the bike, all working. Except i noticed the rubbers what connect them to the airbox are hard as rock, and even didn't make a good seal to the airbox. Thats why i removed everything. I've already ordered rubber flanges between carburetors and the engine, but now i'm hoping i could cancel it, as they probably wouldn't fit too.
Unless 26mm and 31mm carbs have the same outer diameter at the engine side, and those rubber flanges are the same (?)
edit: i attached another picture with the carbs and the airbox installed. The airbox fits the frame perfectly, so either its from this model with its holes bored out to 52mm, to accommodate larger rubbers or came from another motorcycle along with the carbs..
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- rrsmsw9999
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1980 KZ 1000E2
Crashed 6/2016
1980 KZ550A
Sold 3/2016
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- Z550tim
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rrsmsw9999 wrote: If there are no cracks the rubber can be reconditioned with wintergreen, oil, armorall, pinesol, heat, etc. Save $200 if there are no cracks. R
I've tried boiling metod in the past, indeed 60yr old rubber inlet became soft, but once it cooled down it
turned into even harder piece. I haven't tried other methods like soaking in chemicals, i live in Europe so products names are different, i heard Xylene paint thiner can be used. Anyway first of all i wish i knew what exactly do i have, if its from KZ750 then the carb-airbox boots i can get for $20each.
They look very similar to mines, maybe i'll just ask the store to meassure the exact dimensions.
If i don't find the new ones i'll try to seal old ones, with electrical selfadhesing tape at the airbox, and teflon tape where they clamp on the carbs.
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- JoHNY
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Kawasaki Z750P7 Spectre, Triumph Daytona 955i, Honda CBR1000FN
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- SWest
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- martin_csr
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By 1983-on probably most Kawasakis had cv carburetors.
Ducts. The 83 KZ550-M1 Ltd shaft has an airbox & carbs that appear to be the same as yours.
Z1Enterprises.com has the airbox ducts. oem. part #14073-1083.
I'm not certain they are correct for the GT550. I'd guess yes, just a guess.
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- Z550tim
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My carbs and airbox looks exactly like stock setup, and indeed they are Teikei CV carburetors. Except that they are supposed to be 26mm instead 31mm i measured, thats my confusion.
Ok, so these rubber ducts i got are just the wrong ones,not for my model, maybe i'll try to sell them.
And those ducts for 83 KZ550-M1 #14073-1083 you mentioned indeed looks exactly like my current ones! And i've just checked some local offers, and they seem to be available and are actually listed for my model GT550G3 in Kawasaki parts catalog, although internet stores list them for 83 KZ550 LTD, no wonder i haven't came across them.
I just need to confirm their diameter at the carb side. as they should be ~50mm
Thanks for your responses.
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- Tyrell Corp
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The early CV carb measurements are a funny one here, what we measure the ventuiri as 26mm /27mm actually are the same as the 30mm. Strange but true. I think the rubbers are different though?
Also then later model GT550 and zephyr 550 had a different carb spacing due to a revised cylinder head IIRC ...and Kehin CVK30 semi flatslide carbs.
Don't confuse your late model shaft CV carb for the earlier slide carb 70's z550...same name, very different bikes.
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
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- Z550tim
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I got new rubber ducts Part no: 14073-1083 which is for this particular model and they fit perfectly.
Attachment carbrubber14073-1083.jpg not found
So my carbs indeed must be stock ones, its just the issue with measuring this venturi diameter, maybe its 26mm in the middle of the carburetor.
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