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How many fins on R90S cylinder?

The place to discuss the R 90 S as well as the R90S Worldnet archives!
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tm.chao
Posts: 4
Joined: Thu Jul 24, 2014 12:38 pm

How many fins on R90S cylinder?

Post by tm.chao »

How many fins should R90S have on cylinder?

On mine : 10 fins

2014 R90S by MAX BMW: 10 fins

Boxer Metal: 11 fins (https://www.flickr.com/photos/bmwmoa/se ... 008561254/)

Most photos on internet : 11 fins

Was there any modification story or technical change in the past?
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skychs
Posts: 586
Joined: Fri Nov 25, 2016 2:12 pm
Location: Richmond VA
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fins

Post by skychs »

Mine has 11.
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1966 R60/2, 1967 R69S, 1975 R90S, 2020 R1250GSA

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