Carb change.

[Chris Bohane]

I have a 1983 GS850.

Does any one know what carbs other, than the Mikuni BS 32 CV's, that will fit this bike please?

Thanks,
Bozza

[Steve]

The standard answer is "with enough time and/or money, anything can be made to fit."

What is your reason to change?

The BS32 is known to work. It obviously has enough flow capability, as it's the same carb used (but with different jetting) on the 850.

.

[Chris Bohane]

Carb change

The previous owner of the original bike had different carbs and pod filters, he put on the present carbs and the standard air box for the sale to me.

I can start the bike and it runs fine on choke but bogs down when I try to rev it.
She will run when warm.

BS32's in the UK are rare so I thought that a compatible carb would be the soloution.

[tom203]

The previous owner of the original bike had different carbs and pod filters, he put on the present carbs and the standard air box for the sale to me.

I can start the bike and it runs fine on choke but bogs down when I try to rev it.
She will run when warm.

BS32's in the UK are rare so I thought that a compatible carb would be the soloution.

What are these "present carbs"? Why did previous owner change back?
If it runs well when warm (no bogging), it might just need a good cleaning - ckoke and idle passages could be gummed up.

[7981GS]

Fix what you have or find a set of 34CV's from a '80-up 1000.
I used them on one of my 850's for many, many years.

Daniel

[Nessism]

I don't understand why you would want to change away from the OE carbs. As long as the carbs are clean, have fresh O-rings both inside the carbs and on the intake boots (cycleorings.com sells a kit), and the airbox is properly sealed, the bike should run fine. Swapping the carbs to something different will still require a complete cleaning and O-ring replacement, and will require rejetting as well. Way more work.

[hampshirehog]

Chris, if you need BS32s there's usually no problem getting hold of them. Yamaha and Kawasaki used them on loads of bikes as well as Suzuki. I think they maye even have made an appearance on Trumpets as well. Spacing won't be the same on them all though so you'll need to sort that.

VM32s will fit straight on (but you'll spend the rest of your life looking for them).

If she's already wearing the right carbs, like the guys said, a strip down, clean and rebuild with new rubber will get you sorted.

[cowboyup3371]

Honestly, it sounds like you need to clean the carbs good and replace your intake boots/orings as necessary.

Swapping the carbs to something different will still require a complete cleaning and O-ring replacement, and will require rejetting as well. Way more work.

and more costly

[Chris Bohane]

Carb change

Thanks very much for the replys.

I have ordered an O ring set and will follow the carb rebuild post on here.

Once again, many thanks.

Regards.

Chris