throttle questions

i have a 77 kz650b with a bit of a throttle issue. it doesnt recoil like it should, so i have to push the throttle closed by twisting it back.

questions:
one cable appears to be for opening, one for closing
right?
there seem to be tensioners on both, they are loose.

there is a spring on the rocker mechanism on the carbs where the cables attach. is this the only thing that automatically closes the throttle?

maybe the spring needs to be replaced? or some lube shot into the cable housings?

thanks!
david

do the slides shut with cables disconnected? probably needs new cables,take throttle apart while cables are off and clean it up also

It can also be the routing of the cables then self.

Mark

thanks everyone! i am going to take the cables off and lube them in the housings first, and make sure the throttle closes with no cable attached. if that doesnt fix it, where is the best place to get cables?

thanks,
david

I would say get you cables from Z1 enterprises, they are a grat place.

I had a similar problem on my '77 KZ650-B1.

I replaced the cable (lubrication may work well for you), greased the twist grip throttle assembly and greased the carburetor rail. The throttle effort and return became so smooth and light that I was able to replace the return spring on the carburetor assembly with one that has about 1/3 of the tension... this made it much more comfortable for and much easier on my vintage wrist for those longer trips.

Hope you can get away with just lubricating. Best of success.
Bill