WTB - Throttle Linkage Shaft - Torsion Shaft

[tdgray]

Starting to piece together some parts for the Zenith 35 / 40's to get rid of the cruddy Webers.that came with my car.

One thing I definitely need is the linkage rod. Or as they call it in the parts catalogue the "torsion shaft".

Number 7 in the picture below.

The carbs and manifolds I bought have #2 and #17 attached but would not be opposed to buying the entire thing if someone has it.

 

[Thomas76]

I have spare parts that came with used Webers I bought here. The linkage rod looks very similar but not exact.
I don't know if unique rods exist for each manufacturer?

 

[tdgray]

That’s very similar. Maybe one of the boys can opine on the differences.

i do see that there were two part numbers with not much explanation on the variations.

 

[boonies]

The rod assembly that @Thomas76 is showing is an original BMW part.

 

[stphers]

I believe that they were different from Auto to Std or maybe the later cars with more emissions sorry can't remember any more than that

Thanks, Rick

 

[tdgray]

I agree it looks like it should be the part. Look like a little lifting tab or maybe a stop. Possibly for some kind of sensor or something.

I think it is at least worth a shot.

 

[jmackro]

Starting to piece together some parts for the Zenith 35 / 40's to get rid of the cruddy Webers.that came with my car.

One thing I definitely need is the linkage rod. Or as they call it in the parts catalogue the "torsion shaft".

tdgray:

- Are you saying that your car now has sidedraft Webers, and that you don't have that linkage rod at all?

- Or that it has downdraft Webers, and has a straight rod (like the one Thomas76 shows in post #2)?

If the latter, that straight rod will work with your Zeniths, unless as stphers noted in post #5, you have a late car / automatic / all your emissions equipment, or whatever else motivated BMW to change the straight rod to that "kinked" style shown in the parts book diagram that you posted.

If the former, the more common, straight rod will work equally well with your Zeniths (again, unless your car somehow needs that kink).

 

[tdgray]

Downdraft Webers came on my car. Thanks for the info... The linkage on there just didn't look like it would work with the Zeniths but I am still learning all of this as I go. This is a 71 2800 4 speed... so no auto, emissions or any of that fun stuff from the later cars!

Maybe I will have two solutions and see what the best one is!

 

[stphers]

Don't get me wrong and I really like the Zeniths but what is wrong with the webers? They are not hard to rebuild and will clean up quite nicely using the right methods The Zeniths are a great carb WHEN they have been gone through and set up properly by someone who knows all the little tricks Webers are pretty easy to set up. Just thinking. You need the rod that Thomas76 has shown

Thanks, Rick

 

[tdgray]

I’ve rebuilt the Webers And yes, they are running fairly well. Still not quite great but much better than they were when I got them. Idle is good and power is okay. They are pretty worn. Shafts bind a bit and the is after a good ultrasonic cleaning and an oiling. I think they are just old and worn out.

I was pretty handy with the zeniths back in the day and never really had a problem with them.

Not hating on Webers at all. They are a good simple durable carb for sure.

 

[bluecoupe30!]

Well, I have this set of Zeniths, complete with manifolds, hoses and the linkage rod I believe you are looking for. LMK if this is the correct rod. Mike

 

[eriknetherlands]

There is another version of the rod with a step in the middle, as if it had to clear something.
I think I have both somewhere I can snap a pic to use as a comparison.

 

[tdgray]

I’ve received the rod from Thomas. It definitely fits and has the correct high idle adjusting tab for setting your timing.

Only thing I am missing from it is one of the plastic “cups” for the end.

Thanks Thomas. You guys are truly awesome!

 

[Stevehose]

I’ve received the rod from Thomas. It definitely fits and has the correct high idle adjusting tab for setting your timing.

Only thing I am missing from it is one of the plastic “cups” for the end.

Thanks Thomas. You guys are truly awesome!

FCP shows still available:

BMW Ball Joint - Genuine BMW 13211250903

BMW Ball Joint - Genuine BMW 13211250903

www.fcpeuro.com

 

[stphers]

I believe that those cups are NLA If you check FCP, they show no stock and no reorder time If you need one, best to go 3D printing

Thanks, Rick

 

[tdgray]

You are correct Rick.

I swear I saw them somewhere but can’t remember where.

 

[stphers]

I looked for them all over the place and could not find any so I just cleaned up the old ones and reused them

Thanks, Rick

 

[tdgray]

So I was talking to a buddy of my sons… he may be able to 3d print these cups. My boy is going to pick the one up I have.

Would anyone be interested in some? No idea what cost etc.

 

[stphers]

Depending on cost I would take at least 4

Thanks, Rick