1979 xs750 choke wont stay on.

[GuitarGuy1996]

Hey guys, I've got a 79 xs750 that I just cleaned and rebuilt the carbs on and now, the choke wont stay on. The plungers move free as a bird but they won't stay still! I'm sure I probably just put something back together backwards or something. Any help on this would be great. Thanks guys!

 

[atom4488]

Did you remove the choke shaft from the bodies? if so, did you notice a minute little spring and ball fall out somewhere? That's the choke shaft detent mechanism. Ask me how I know. The wise elders on this forum set me straight!

 

[atom4488]

Check out this thread:

BS34 Carb Diagram/Schematic/Exploded View​

 

[atom4488]

Sorry, here: https://www.xs650.com/threads/bs34-carb-diagram-schematic-exploded-view.44960/

 

[GuitarGuy1996]

I didn't notice it when I took it apart. There is a spring on the plunger but I never saw a second one. I went ahead and checked the spare carb parts and bodies that I got with the bike and none of those bodies had anything different either.

 

[jpdevol]

Can't remember XS750 specifically, but the BS34 carbs with pull-knob choke need the springs and 1/8" balls to engage detents on the rod, while the cable choke models did not have them and the choke position is held by the cable/lever