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What other year CARBURETORS fit a 1977 KZ750 TWIN B1? My 6 year old broke em

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11 Aug 2022 06:16 - 11 Aug 2022 06:17 #872037 by ShaneDude
Looking for suggestions.
My 77 carb body might be damaged beyond repair.
Found out why my choke starter plunger is bent.
It wasnt me when I tapped the carbs. My 6 year old son was in the garage trying to "fix my bike" the other day with my lead hammer., imitating me tapping the carb bowls with a screwdriver.
I checked the garage video feed and saw him do it two days ago. He likes to "help" and banged on the carb body and I think bent the starter plunger mechanism or or rod. Now it wont close unless I push it HARD with my hand.

if anyone has a set for sale. Or replacement suggestions, let me know.
Normal, choke off


Choke Opened


Wont close unless forced:

Last edit: 11 Aug 2022 06:17 by ShaneDude.

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11 Aug 2022 06:28 #872039 by Wookie58

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11 Aug 2022 06:29 - 11 Aug 2022 06:34 #872040 by TexasKZ
If it were mine, I would find out what is bent and the straighten the bent bits.

Upon closer inspection, it looks like the casting that the plunger screws into has a non-factory flat spot on it. If the plunger does not unscrew without excessive force, there may be a bigger project involved. Still, I would find out exactly what is messed up and then decide the path forward.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
Last edit: 11 Aug 2022 06:34 by TexasKZ.

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11 Aug 2022 06:39 #872041 by ShaneDude
I told him "I saw you were trying to fix the bike on the video. thanks little man, but next time let daddy show you. you did a good job! Now Im going to take the carbs off so they can get polished!" lol

I really hope the plunger can be straightened.

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11 Aug 2022 06:40 - 11 Aug 2022 06:59 #872043 by ShaneDude

If it were mine, I would find out what is bent and the straighten the bent bits.

Upon closer inspection, it looks like the casting that the plunger screws into has a non-factory flat spot on it. If the plunger does not unscrew without excessive force, there may be a bigger project involved. Still, I would find out exactly what is messed up and then decide the path forward
 
...
Last edit: 11 Aug 2022 06:59 by ShaneDude.

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11 Aug 2022 06:59 - 11 Aug 2022 07:00 #872045 by martin_csr
Best fit are probably the 77-80 750B/G models, since they have the same carb holders & airbox.  You could use the later CSR or Ltd Belt carburetors, but then you might have to bother w that other stuff mentioned.  The 750 Twin engine is pretty much the same thru the entire model run w just minor differences. steell & bountyhunter are pretty knowledgeable on the models, in case you stumble across any of their posts.
Last edit: 11 Aug 2022 07:00 by martin_csr.

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11 Aug 2022 07:00 #872046 by ShaneDude
Thanks for this. I had asked the question a few times and didnt get a response. If someone else on this site knows what other carbs may fit on this bike, please let me know. My neighbor just made me an offer on this bike so who knows, I may not care anymore by the end of the day.

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11 Aug 2022 07:04 - 11 Aug 2022 07:19 #872047 by martin_csr
From Partzilla the 76-78 B models had the same carburetors, but the 79-80 B/G should fit the same. 

edit:  the 79 B carbs might be the same; the x-ref indicates 2 carb assy part numbers. Kawasaki lists the B4 carburetors separate from the earlier B models. look at the 77 diagrams to see what I'm talking about. 
www.partzilla.com/catalog/kawasaki/motorcycle/1977/kz750-b2
Last edit: 11 Aug 2022 07:19 by martin_csr.

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11 Aug 2022 07:06 #872048 by ShaneDude
Awesome. Thanks again. Hopefully the bent starter plunger can be straightened. I'll take the carbs off this afternoon and post an update

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  • gd4now
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  • Denco where did you go?
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11 Aug 2022 08:59 #872059 by gd4now
As I ;understand it the 76-80 750 twins came stock with BS38 carbs. The 82 -83 models came stock with BS34 carbs. You may find info at this link of interest.
www.wgcarbs.com/index.php/using-joomla/e...-categories/93-KZ750

Again as I understand it some of the Yahama bikes also made use of the BS38 carbs.  

1977 KZ650 B1
Pods and Denco header


OLD KAW OWNERS SMILE ALOT

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11 Aug 2022 09:17 #872061 by ShaneDude
Thanks for pointing this out. I realized this when I was researching this morning. Im going to have mine rebuilt, and the starter plunger straightened out.

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11 Aug 2022 10:07 #872063 by Mikaw
Beyond an obvious bend in the choke plunger Id be looking at the “non factory” flat spot the Tex noticed. The plunger is a snug fit to the bore. Your little helper might have made your round bore into a “D” shape. I’m sure it could be drilled to correct. 

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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