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Old 01-06-2013, 12:42 AM   #1
DiabloADV OP
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Shift linkage boss?

When did the airhead frames first get the boss to which the shifter linkage attaches? As opposed to the shifter that attaches directly to the shifter shaft on the gearbox...

I find pics of /5 and /6 bikes without it, and later bikes with it. But when did it first appear?
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Old 01-06-2013, 01:29 AM   #2
Rob Farmer
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I'm not too sure but I thought it was 77/78 but a lot of bikes had it retrofitted because it improves the gear change so much.
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Old 01-06-2013, 02:33 AM   #3
carpetburn
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correct- i fitted one to my/6
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Old 01-06-2013, 03:05 AM   #4
boxerboy81
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It's easy enough to find pix of 1978 models with the direct gear lever, and even some 1979 ones. I'm guessing it's during the 1979 model run starting with the straight rod with the rubber bellows cover.

edit: Have a look at this 1978 brochure...



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Old 01-06-2013, 11:08 AM   #5
rambozo
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Both my 78 and 79 have the rubber bellow shifter as per that photo

Robs probably right with 77/78 year
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Old 01-06-2013, 11:28 AM   #6
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Quote:
Originally Posted by Rob Farmer View Post
I'm not too sure but I thought it was 77/78 but a lot of bikes had it retrofitted because it improves the gear change so much.
Does it really improve shifting that much?

I have a direct on my '77, but I haven't been able to put many miles on the bike since I got it. Although, my left foot feels a bit cramped on the peg and that the shifter doesn't stick out far enough to get my toe under it. But I wonder if changing to the linkage would improve that specific issue.
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Old 01-06-2013, 12:02 PM   #7
outfit
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Quote:
Originally Posted by Rob Farmer View Post
I'm not too sure but I thought it was 77/78 but a lot of bikes had it retrofitted because it improves the gear change so much.
I've retrofitted both my Mono and /7 to direct year's ago The gear linkage may well have been okay when new, but the sloppiness soon set's in. Anyway's I think it was just a publicity stunt by BMW in answer to press complaint's.
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Old 01-06-2013, 12:57 PM   #8
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My bike is a 74 90/6, and has the shifter boss. So I guess it was retro-fitted. How would somebody tell a /7 frame from a /6 frame?
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1974 R90/6 w/1050 kit. Motor only. Seeking a frame.
1970 R60/5

'91 Bill Holland Steel w/Dura Ace
'01 Z3 3.0 Coupe. The Clownshoe.
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Old 01-06-2013, 01:28 PM   #9
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It had to of been late '78? I remember lots of our customers making the retro-switch. Lots of people said that it improved shifting quite a bit. I do too. Sloppy? The have replaceable bushings, bearings, and bolts. I have repaired quite a few of them and then they are like new again.
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Old 01-06-2013, 10:51 PM   #10
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Quote:
Originally Posted by DiabloADV View Post
How would somebody tell a /7 frame from a /6 frame?
Serial number?


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