CV Carb question

  • School Teacher
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CV Carb question

30 Jan 2011 18:30
#427231
Hey guys i was wondering how much "slack" should be in the diaphram of a cv carb. These are on a 83 gpz305 which are the sam as a kz305 but the slides are shorter so they open up more.to get 34 horse instead of 27! any way see the wrinkles in the diaphram it seems like there is extra material than needed.
1976 kz900 in parts but will be going some day soon
1980 kz1000G1
1976 kz900 parts bike
1979 kz1000 shaftie parts bike
1978 kz1000 33mm smoothies 1075 kit
Troutdale Oregon USA

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  • School Teacher
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Re: CV Carb question

30 Jan 2011 18:31
#427232
And the other sider
1976 kz900 in parts but will be going some day soon
1980 kz1000G1
1976 kz900 parts bike
1979 kz1000 shaftie parts bike
1978 kz1000 33mm smoothies 1075 kit
Troutdale Oregon USA

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  • Nebr_Rex
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Re: CV Carb question

30 Jan 2011 18:33
#427233
look normal to me
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected

www.dotheton.com/index.php?threads/dr-je...air-of-kz400s.39120/


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  • School Teacher
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Re: CV Carb question

30 Jan 2011 18:58
#427241
they are keihin 32 cv

Thanks
Anyone else they look normal?
1976 kz900 in parts but will be going some day soon
1980 kz1000G1
1976 kz900 parts bike
1979 kz1000 shaftie parts bike
1978 kz1000 33mm smoothies 1075 kit
Troutdale Oregon USA

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  • JR
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Re: CV Carb question

30 Jan 2011 20:13
#427257
I have Keihin CV34s on my 1980 750E1 and the diaphragms look very very similar.
Normal
How's the bike running ?
1980 kz750E1, Delkevic exhaust

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  • School Teacher
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Re: CV Carb question

31 Jan 2011 12:43 - 31 Jan 2011 12:44
#427449
If I hammer it, in the mid range it surges(like i was hammering the throttle and then releasing it) idle great, starts great full throttle is great once the surging bucking bronco act is done, have cleaned the carbs and blown through them 5 times. i have the stock air box and filters, the boots look fine and plyable.
1976 kz900 in parts but will be going some day soon
1980 kz1000G1
1976 kz900 parts bike
1979 kz1000 shaftie parts bike
1978 kz1000 33mm smoothies 1075 kit
Troutdale Oregon USA
Last edit: 31 Jan 2011 12:44 by School Teacher.

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  • TeK9iNe
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Re: CV Carb question

31 Jan 2011 15:57 - 31 Jan 2011 15:59
#427487
School Teacher wrote:
These are on a 83 gpz305 which are the sam as a kz305 but the slides are shorter so they open up more.to get 34 horse instead of 27!

What? :laugh:

Anyways...

If the slides are shorter than the origionally intended product, than you are most likely too lean in the mid range, and require raising the needle, or new needle depending. The main is probly too lean for max power as well...

It doesnt matter how much slide rubber is in there so long as the slide reaches full bottom to top without any hinderence.

good luck.

B)
Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)
Last edit: 31 Jan 2011 15:59 by TeK9iNe.

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  • CoreyClough
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Re: CV Carb question

31 Jan 2011 15:58
#427488
+2 on them looking normal.

On your running issue, will it pass that fluttering rpm range, and open up above that, or just never get past it?

Going through the carbs entails using one of these:

Just blowing everything out, won't cut it.

Might want to try it again with the gas cap popped open, as the tank might not be venting.

Good luck.
'85 GPz550(ZX550-A2)

GPz550 Base Manual --> tinyurl.com/ze5b3qo
GPz550 Supplement Manual --> tinyurl.com/h34d2o6
GPz550.com --> www.nwsca.com/scripts/gpz_forum_2005/default.asp
First Race Win GPz550 --> tinyurl.com/o5y3ftp

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Re: CV Carb question

01 Feb 2011 22:58
#427772
Will do Corey, thanks on the cap, i will try it.

TeK9iNe they are stock for the bike, they came on the kz305 also just different slides.
1976 kz900 in parts but will be going some day soon
1980 kz1000G1
1976 kz900 parts bike
1979 kz1000 shaftie parts bike
1978 kz1000 33mm smoothies 1075 kit
Troutdale Oregon USA

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Re: CV Carb question

01 Feb 2011 23:01
#427773
Corey


When and if it gets through the range of whoop-de-dos it pulls like a mother, it wants do lift the front wheel off once it makes it to true wide open.
1976 kz900 in parts but will be going some day soon
1980 kz1000G1
1976 kz900 parts bike
1979 kz1000 shaftie parts bike
1978 kz1000 33mm smoothies 1075 kit
Troutdale Oregon USA

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  • CoreyClough
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Re: CV Carb question

02 Feb 2011 04:06
#427783
Here is a link I have kept in my favorites for tuning these carbs.
www.factorypro.com/tech_tuning_procedure...igh_rpm_engines.html

Could also be getting the carbs sync'ed would aid in a smoother low to midrange running. Bench-syncing them once off the bike will get you close, but vacuum syncing them will be even better.
'85 GPz550(ZX550-A2)

GPz550 Base Manual --> tinyurl.com/ze5b3qo
GPz550 Supplement Manual --> tinyurl.com/h34d2o6
GPz550.com --> www.nwsca.com/scripts/gpz_forum_2005/default.asp
First Race Win GPz550 --> tinyurl.com/o5y3ftp

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  • Marneman
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Re: CV Carb question

02 Feb 2011 07:24
#427801
Thanks for the link Corey, very informative. It's now in my favorites.
77 KZ1000-A1 "Bushido" Project
82 KZ1000 LTD "Terri Lee"


You know what, I don't have a one to some other number of douche-bag scale. So.. Six!

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