Carb compatibility?

[Goss]

I currently have 3 sets of carbs, one on my Martin and 2 that I am rebuilding, the Moto Martin has VB63A's as standard as the motor is a 1980, the other sets are something like VB65 and VB67 I think.

My question is how are these carbs compatible with the different motors, I know that the rubber carb to cylinder head mounts differ as the later ones are cranked to level up the carbs. I have a broken float post on my VB63 and one of the later sets of carbs that I am working on is near mint internally, less than 2,000 miles on them and would like to upgrade.

Does anyone have a list of the carb models including european models and the technical differences between them?

Regards

Goss

[daves79x]

Goss:
Any version of CBX carbs will work on any year CBX just fine. Here in the US, we had 3 versions: VB60 -'79, VB62-'80, and VB64-'81-'82. I believe the VB63s you have are original Euro-spec '81-'82 carbs. I've cleaned a set of those and could find no difference between them and our VB64s. Our later VB64 carbs have screw-in pilot jets also.

Anyway, whatever minor differences there are in the Euro-spec carbs of different years should not be a problem and I'd bolt on whatever set you think is the nicest, of course with whatever jetting changes you may need to make for altered intake/exhaust combo you have.

Dave

[EMS]

Have not heard of VB65 or VB67 carbs for CBX. If they are not in a bank of six, but individual carbs, they may be for a different Honda model.

[Goss]

Thanks for the info Dave, my sets are VB61A, VB63A and VB65A so they must all be European. The 65A's are a beautiful set so I may jet them to 110's and see how they perform. I am having problems with Ethanol eating my fibreglass fuel tank at the moment so really need to get this fixed before going out on the bike.

EMS, I guessed my numbers incorrectly, they are all banks of 6, looks like odd numbers for Europe and even for USA?

Thanks and regards.

Goss

[EMS]

Following the numbering system I am familiar with, VB60A are 79 U.S. carbs, VB61A are Euro '79 carbs. VB62A are U.S. 80 Carbs, VB63A would be Euro 80 or CBX- "A" carbs.
While VB64A-A are U.S. 1981 and VB64A-B are U.S. 1982, a VB65 could be a set of Euro Prolink CBX-B and C carbs. But I have never seen a set, nor have I seen a VB67. What would be a VB66?