Vintage BMW Motorcycle Owners

Hi
Part 4 in the parts diagram...Thrust Rod.
Can anyone tell me the length and diameter please?
Thanks
Richard

Hey Richard,

Sorry for the late reply.

The thrust rod for the R90S and R90/6 have the same part number - ...309. I have a '74 R90/6 in the shop and I'm rebuilding the master cylinder so I can give you the sizing for this one.

5.97mm diameter.
26.50mm length.

Let me know if you plan to spin one up as the ends have a radius and I can give you those measurements and photos if needed.

I hope this helps,
Scott

Looks like the part number 34311233309 is used on all models with the undertank mastercylinder.

Hi Kurt,

Hopefully the R25 will be back on the road soon. It looks like you have it close to being figured out.

In my very quick search I noticed the push rod (34 31 1 233 309) is NLA on the sites I checked. Unless Richard can find another used one I'm thinking he'll probably need to turn a new one.

Scott.

sblaylock wrote: ↑

Tue Jan 04, 2022 5:56 pm

5.97mm diameter.
26.50mm length.

Let me know if you plan to spin one up as the ends have a radius and I can give you those measurements and photos if needed.

I hope this helps,
Scott

Hi
Thanks that the info I needed.
I will whip one up in the next few weeks.
The end radius shouldn't be an issue..I can figure that one out.
Thanks again
Richard

Hi
Got bored so knock this up. 316 Stainless so should be as good as new.
Thanks
Richard

Looks good.

You should make a few more so we'll all know who to email when we need one


Scott.