1 reply [Last post]
tm.chao's picture
VBMWMO #8769
Joined: 07/24/2014
Posts: 3

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/sets/72157692008561254/)

Most photos on internet : 11 fins

Was there any modification story or technical change in the past?

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skychs's picture
VBMWMO #9221
Joined: 11/25/2016
Posts: 233

Mine has 11.

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