BS 38 Carb Diaphragm Replacements

[alwaysmonday]

5twins - I've got a 79 with BS38. Thanks for the confirmation.

Jon

 

[dwaynemcfarlane]

Hey Guys!
I need instructions on how to change the diaphragm on my mikuni bs38. Ive been searching the internet but i cant find anything on the bs38.
Sincerly
D

 

[jetmechmarty]

Hey Guys!
I need instructions on how to change the diaphragm on my mikuni bs38. Ive been searching the internet but i cant find anything on the bs38.
Sincerly
D

Here you go!
http://jbmindustries.com/yamaha650.html

 

[GLJ]

Or you could do as I did and take the easy way out like I did. Been running a set in my XS2, so far so good.
https://www.ebay.com/itm/Yamaha-Car...-XS-650-500-256-14940-00-CV-BS38/193379635309

 

[5twins]

But be aware, those slides are only for the '77 and older BS38's. '78-'79 slides are different.

 

[azman857]

I just ordered 6 JBM M-73's for my '80 SG and for the BS34's for my '82 750 GPz Kawasaki. Got the slides al ready for them.

 

[dwaynemcfarlane]

Yeah ive been on that link but i dont understand if i need any new retaining washers on the new diaphragm? I dont feel comfortable just using super glue...
D

 

[TwoManyXS1Bs]

No washers, but I *do* recommend using glue...

http://www.xs650.com/threads/jbm-industries-bs38-diaphragms-fail.51656/

Edit: Using an o-ring to fill the gap is OK...

Post #17.
http://www.xs650.com/threads/bs-38-carb-diaphragm-replacements.999/