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avi
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israel
Joined: 01/08/2014
Posts: 142

Hello
what is the difference between R11and R12 Motor?
Case,internals?

Luigi bmwR68
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ITALY
Joined: 05/22/2008
Posts: 47
R11 Serie I - IV

...they have the chain of distribution instead of the gears (only R11 R16 Serie V have the chain , six screws instead of four on the front motor dekel)
The gearbox is different and I think the attacks are different but I have to watch..
the internal bearings must be looked at in the manual

(In the picrutes R11 Serie II , you canlooks difference from R12)
Ciao! Wink

  • r11motore_spaccato.jpg
  • r11cilindri.jpg
  • r11motore_spaccato.jpg
avi
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israel
Joined: 01/08/2014
Posts: 142
Thank you !!! now its

Thank you !!!
now its clear
do you know if crankshaft is different?

avi
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israel
Joined: 01/08/2014
Posts: 142
Is it possible that R11 1934

Is it possible that R11 1934 has 6 bolts for the cover?

Luigi bmwR68
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ITALY
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Posts: 47
R11 Serie V

Yes R11 serie V was made in 1934 , whit large 6 bolts cover like R12

Ian R11
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VBMWMO #8148
Yorkshire uk
Joined: 10/22/2011
Posts: 204
The chain driven cam engines

The chain driven cam engines have 6 holes on the front cover as Luigi says. Do you have 1934 series 5 engine? The crankshaft is different to earlier gear driven cam R11's along with the main bearing types. Deep grove ball bearings (6207M) in the series 5 and i believe roller bearings in the earlier versions.
The cases for series 5 R11 and R12/17 are interchangeable but have a different breather outlet and different cam followers fitted.

  • img_1916.jpg
Ian R11
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VBMWMO #8148
Yorkshire uk
Joined: 10/22/2011
Posts: 204
Photos of chain driven engine

Photos of chain driven engine case.

  • 78ac7579-1da8-44ea-a702-4df7cbff5ae3.jpeg
  • 95f69e19-4e0e-491e-bec6-8e037d047a62.jpeg
avi
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israel
Joined: 01/08/2014
Posts: 142
Thank you Ian this is very

Thank you Ian
this is very helpful.

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