Carb swapping, immoral, deviant, or just plain wrong

retrex · Post by **retrex** » Thu Jan 19, 2006 12:34 pm

Is it possible to swap early and later year carbs on the CBX? Are there any benefits to doing so? What are the main carb differences differences between the model years? Just one more piece of sacrilage, I have two spare sets of 4 cylinder 81 Suzuki GS1100 CV Mikunis, has anyone every swapped Mikuni carbs for the Keihins?

Jeff Bennetts · Post by **Jeff Bennetts** » Fri Jan 20, 2006 7:02 am

It happens all the time. You will need to match the MM 29-34 depending on whats been done to the motor internally.

You will need to build a mounting rack, choke system, throttle cable and find rubber manifolds that will work.

No big deal if your handy or have a fat wallet.

jb

retrex · Post by **retrex** » Fri Jan 20, 2006 12:55 pm

I'm thinking that the standard Mikunis would probably be a bit to rich because they feed volumetrically a bigger cylinder, but that is a down stream problem. As I see it what you are saying is the problems to solve are as follows in roughly the order given.

1. Attaching the carb output openings to a modified intake boot system.

2. Attaching a left and right carb bank support support structure.

3. Attaching the left and right carb banks together, leaving enough space in between to rig throttle, throttle stop and choke gizmos.

4. Rigging a common throttle actuation system, that is a central gizmo that when you twist the throttle operates both the left and right carb banks in unison.

5. Rigging a common choke actuation system.

6. Rigging a common throttle stop

7. Running fuel supply lines of adequate flow rate

8. Air filtration system

9. Proper jetting

10.The unkown odds and ends.

Am I misssing anything? Jeez what could be easier that that.

Er, ah, maybe I'll just clean and sync the carbs I have.

Dave Ditner · Post by **Dave Ditner** » Tue Jan 24, 2006 1:10 am

If there's any real advantage to the 82 carb set it's that the idle jets in those can be removed. They are screwed in verus the earlier ones being pressed in and being called "non serviceable"

retrex · Post by **retrex** » Thu Jan 26, 2006 7:30 am

I just received a set of CBX carbs from an ebay purchase. How can I id what year bike they go to?

real6 · Post by **real6** » Thu Jan 26, 2006 10:04 am

What is the number on the side of the carb?

retrex · Post by **retrex** » Tue Jan 31, 2006 12:03 pm

real6 wrote:What is the number on the side of the carb?

Sorry for the slow response I am not receving notification of replys for some reason. I will investigate tonight. The only thing I remember is a VB on the end carb.

retrex · Post by **retrex** » Thu Feb 02, 2006 7:04 am

retrex wrote:
real6 wrote:What is the number on the side of the carb?

Sorry for the slow response I am not receiving notification of replys for some reason. I will investigate tonight. The only thing I remember is a VB on the end carb.

Computer Fart, how do I delete this post?

retrex · Post by **retrex** » Thu Feb 02, 2006 7:08 am

I was finally able to look at the side of the carb and the number on it was VB 62HBRE7. I have taken the rubber carb insulators off the head that I am working on and they will all have to be replaced. They cracked and splintered as if they were made of hard plastic. Are these things still available?

real6 · Post by **real6** » Fri Feb 03, 2006 9:47 am

1979-model 422, carb VB60A: 1980-model 469, carb VB62A

retrex · Post by **retrex** » Mon Feb 06, 2006 7:04 am

Thanks for the info real6.

Mike Nixon · Post by **Mike Nixon** » Sat Feb 18, 2006 11:58 am

You may also like to look under the carb top to confirm that it is a 79. The 79 carb is unique in the respect that it has three atomizing circuits as opposed to the other carbs' two. The extra one -- the primary main -- has a brass air bleed orifice on the right side of the carb (looking from the saddle). See the picture below. If your carb looks like this, it's a 79 model carb.

Mike Nixon · Post by **Mike Nixon** » Sat Feb 18, 2006 12:00 pm

Jeff -- Nice set of carbs. You're right about the wallet, though. :)

Jeff Bennetts · Post by **Jeff Bennetts** » Sun Feb 19, 2006 4:02 pm

Mike Nixon wrote:Jeff -- Nice set of carbs. You're right about the wallet, though. :)

Hey Mike, Ya I forgot to mention you can't buy them in bigger lots than 4 at a time, so you either have to buy 2 sets of 4=8 and eat 2 of them, or get someone else who wan'ts to do it and buy 3 sets of 4=12, ouch on the pocket book.

Its cheaper to put some later model SB's or CV's from a factory setup and just adapt them. The CBX doesn't really need all the carburetation unless the motor is a big bore and your going straight line racing.

jeff

Mike Nixon · Post by **Mike Nixon** » Sun Feb 19, 2006 4:14 pm

Jeff -- Yeah. You're right. There are a couple of retailers who are presently putting together sets of CRFs for us, but they are really spendy. There are some other alternatives. The bad thing about the CBX though, if trying to fit carbs from other models, is the CBX's odd manifold spacing. It's really tight, much tighter than most other bikes. Takes some reworking to make it work. But it's doable. It appears that our comrades in Britain have been doing interesting things with ZX6 carbs, and I have researched another route that I hope to follow up on one day. Those your carbs? Man, they look nice. Thanks for the reply. :)

The International CBX Owners Association

Carb swapping, immoral, deviant, or just plain wrong

Carb swapping, immoral, deviant, or just plain wrong

Frankencarbs mental exercise

Carb Swaps

Carb IDing

Will check

Re: Will check

Carb ID #

Carb info

...carb types

...carbs

Re: ...carbs

...carbs and such