'79 KZ650B3: Vm24s vs CV carbs?

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08 Oct 2011 14:08 #482039 by seanof30306
'79 KZ650B3: Vm24s vs CV carbs? was created by seanof30306
'79 KZ650B3

Currently running VM24s w/accelerator pump

Carbs have had kits put in them, been gone through multiple times, by multiple people; never been able to get them quite right. The first time they were gone through, the guy said one of the carbs was bad, and replaced it with another one, so they're no longer a matched set. I don't know if that has anything to do with it, or not. He also said something about wear on the slides, but he did such a terrible job on them I discounted everything he said, and it's been so long, I've forgotten.

Fitty, my 50.00 parts bike, is an '81 650 LTD. I'd assumed the carbs were also VM24s, but looking closely at them, it is clear they are different. Would that make them CV carbs?

I've read the CV carbs are better, but really expensive to rebuild if the diaphragms are bad.

Assuming the diaphragms are good, and assuming both were working properly, would I see a difference upgrading to the CV carbs? If so, what would the benefits be?

"That @#$%!!! KZ650"
79 KZ650 B3
Dual front disc brakes
Z1R 18" front wheel
Pumper carbs w/pods
MAC 4-1 w/ drilled-out baffle
Dyna S ignition w/ Dyna Green coils
WG coil mod
'81 CSR charging system
17/41 gearing

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08 Oct 2011 14:29 - 08 Oct 2011 14:44 #482044 by Patton
Replied by Patton on topic '79 KZ650B3: Vm24s vs CV carbs?
If using pods, the manual slide carbs should be easier to tune.

Good Fortune! :)


1973 Z1
KZ900 LTD
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Last edit: 08 Oct 2011 14:44 by Patton.

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  • TeK9iNe
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08 Oct 2011 14:30 #482045 by TeK9iNe
Replied by TeK9iNe on topic '79 KZ650B3: Vm24s vs CV carbs?
Depends on how large the CV carbs are and wether or not they flow better/setup for better flow.

They may be better of worse just depending on what you can do with them.

Generally a CV carb will have smoother throttle response (not necessarily better), better fuel mileage for sure (when setup correxctly), and they are more tolerant to atmospheric changes like temp/humidity/pressure, etc.

Cheers.

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 ;)

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09 Oct 2011 08:38 - 15 Feb 2013 11:43 #482127 by martin_csr
Replied by martin_csr on topic -
The 81 KZ650-CSR came stock w VM24 carburetors. The 82-83 models had BS32 CV carbs & those bikes have a higher horsepower (pretty sure). The only significant difference between the 81 & 82/83 CSRs is the carburetors. So, if the hp info is correct, that would be one benefit of the CVs.
Last edit: 15 Feb 2013 11:43 by martin_csr.

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09 Oct 2011 09:50 #482140 by wireman
Replied by wireman on topic '79 KZ650B3: Vm24s vs CV carbs?
measure the intake ports on both heads B)

posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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09 Oct 2011 11:15 - 22 Jan 2013 00:55 #482154 by H1Vindicator
Replied by H1Vindicator on topic '79 KZ650B3: Vm24s vs CV carbs?

Last edit: 22 Jan 2013 00:55 by H1Vindicator.

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09 Oct 2011 16:32 #482177 by seanof30306
Replied by seanof30306 on topic '79 KZ650B3: Vm24s vs CV carbs?

H1Vindicator wrote: There was no 81 650-Ltd. I'm pretty sure this was mentioned before in regards to "Fitty".


From the title:

Vehicle Identification Number: JKAKZEH16BA01****

Year: 1981

Make: KAWASAKI

Body Type: RS

Model: KZ650LTD

Date 1st Sold: 04/20/1982

"That @#$%!!! KZ650"
79 KZ650 B3
Dual front disc brakes
Z1R 18" front wheel
Pumper carbs w/pods
MAC 4-1 w/ drilled-out baffle
Dyna S ignition w/ Dyna Green coils
WG coil mod
'81 CSR charging system
17/41 gearing

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09 Oct 2011 18:25 #482193 by wireman
Replied by wireman on topic '79 KZ650B3: Vm24s vs CV carbs?
could it be a csr,what month was it built? anything build beginning in the 6th month is normally next model year B)

posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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09 Oct 2011 18:56 #482197 by seanof30306
Replied by seanof30306 on topic '79 KZ650B3: Vm24s vs CV carbs?

wireman wrote: could it be a csr,what month was it built? anything build beginning in the 6th month is normally next model year B)


The title doesn't list a build month.

And it doesn't really matter to me what it is. The title says it's an LTD, so I called it an LTD.

"That @#$%!!! KZ650"
79 KZ650 B3
Dual front disc brakes
Z1R 18" front wheel
Pumper carbs w/pods
MAC 4-1 w/ drilled-out baffle
Dyna S ignition w/ Dyna Green coils
WG coil mod
'81 CSR charging system
17/41 gearing

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09 Oct 2011 19:40 #482200 by wireman
Replied by wireman on topic '79 KZ650B3: Vm24s vs CV carbs?
:laugh: build date should be on sticker on steering head

posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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