Possibly spring will turn a new page

[DanEC]

Originally Posted by ERA 778

Dan,
Glad to hear that spring is showing up for you. I usually can take mine out at least once a month through our entire winter. Had it out yesterday morning to give a ride to a friend who had never ridden in a Cobra before. It was great!
What did you do to your speedo cable? Can you point me to the thread? Mine swings at about 40mph and I need to address this some day this spring.

I think there's more than one possible issue with these but it appears mine was due to the play of the inner cable in the outer casing. The inner cable is about 5/16 inch +/- shorter than it should be and if it shifts up towards the speedometer unit, it ends up barely engaged in the plastic gear and can start to strip and slip in the plastic gear at the transmission.

Someone said they made a little spacer to fit over the cable in the connection up at the speedometer so I made one out of a piece of aluminum tubing. But then I found a bunch of small washers that were a perfect fit inside the upper ferrule and the square cable head fit through the center. I stacked a bunch of them in there after doing some rough measurements (probably 7 or 8 of them) and that keeps the cable shifted down towards the transmission and well engaged. I also pulled the center cable out and got some graphite dry lube and lubed the cable good. It came out of the casing from the speedometer end. I also kind of tugged it around to where all bends in it were as great a radius as possible (didn't really change anything much). The combination seemed to steady it quite a bit and it seems to be getting better with more use. Above 15 to 20 mph it's really steady now.

Might be something here that will help.

Here are some threads pertaining to it:

Mech Smith's Speedo bouncing a little?

Lubricating the Smiths Speedometer Cable To Stop Needle Bounce