CB550 Choke won't stay engaged

[FF]

Hey guys,

I have a problem with the choke on my 1976 CB550 K3 with PD style carbs. I just soda blasted and reassembled the carbs and wanted to install the rebuilt carbs today. I also installed a new choke cable. Before installing the carbs for good I hooked up the throttle cables and choke cable. When I pull the choke lever out to engage the choke, the choke blades close but don't stay there. Unless you keep the lever pulled upwards the blades open up again because they are under spring tension. I made a short video so that you can see what I mean:

https://www.youtube.com/watch?v=1cBGcYh1xHo&feature=youtu.be

Did I miss something? I can't seem to figure out how the choke cable can put resistance against the spring tension that pulls the choke plates open again?

Thanks!

Florian

 

[Redliner]

Under the choke knob is a rubber cover. Peel it up and you'll find a plastic nut. Tightening should add resistance.

 

[FF]

Thanks! I tried tightening the plastic nur but it didn't change the resistance. Out of curiosity I hooked up my old choke cable and it works with that one. Must be a problem with the new cable?! Don't understand it but I think I will go with the old cable for now.