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NMrdrnr
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VBMWMO #9376
Albuquerque, New Mexico
Joined: 01/16/2018
Posts: 2

I have a 1964 R69S that I just had slinger cleaning,new top end, and clutch.

I am having problem downshifting, mostly from 4th to 3rd.

I did not have this problem before the rebuild.

There was a Yahoo /2 thread recently about this shifting problem, with the shift lever cotter pin being the culprit.

I am just trying to verify that the shift lever cotter pin should be inserted from the bottom, with the nut on top. I saw a thread here on 1/8/18 that asked how to insert the pin from the bottom once the transmission had been installed.

Mine was installed with the nut on the bottom.

I don't understand how this could cause a problem? Does the shift lever action somehow change with the nut on the bottom? The nut itself does not hit anything, but there is a tiny nick on the inside of the shift lever where it may have hit the exhaust/muffler clamp.

I'm fairly new R69S owner and would appreciate any thoughts.

Jim D 5112
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VBMWMO #5112
Joined: 10/27/2006
Posts: 102
The Nut

I think that the nut on the bottom dose not let the shifter lever travel far enough to let it fully engage 4th gear.

Twocams
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VBMWMO #8750
Joined: 03/16/2014
Posts: 695
I just checked my R69S. Nut

I just checked my R69S. Nut is on top. Just put the nut on top. I think the bolt and nut are down low enough they can hit the frame with the nut on the bottom causing shift problems like you have.

twocams

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Twocams
69 R69S 03 K1200GT
92 R100RT

Daves79x
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VBMWMO #9030
Joined: 08/09/2015
Posts: 304
The Bevel

The bevel on the locating pin allows the shifter to sit rotated too far down if installed from the top. It’s not much, but enough to cause interference with the frame and/or exhaust. It’s well known and has been discussed many times here and elsewhere.

Daves79x

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Dave

NMrdrnr
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VBMWMO #9376
Albuquerque, New Mexico
Joined: 01/16/2018
Posts: 2
Nuts and Bevels

Thanks all, especially Daves79x, for the explanation.

I understood the need to put the nut on top, but not the why I needed to do it. I like knowing the reason.

A /5 I looked at had the nut on the bottom, and the shift lever clears w/no issues. I guess BMW addressed the issue with later models.

I did do a search in the vintage forum with the keywords, (shift lever, cotter pin), with few results.

Again thanks, runs like a dream now.

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