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Difference between engines.
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Difference between engines.
Can anyone tell me the exact difference between a R11 series 5 engine and an R12 engine?
Best regards, Frode
- VintageSalesandRestorations
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- schrader7032
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The BMW Profiles book
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
- Darryl.Richman
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The pictures in the
(The 212 numbers reflect the renumbering of all parts that the German Wehrmacht required in order to make things easier on their quartermasters. The leading 2 indicates that it's a part for a motorcycle, and I believe that the 12 indicates BMW.)
My understanding of the S5
The S5 cam follower bushings allow the follower to directly fit into them like the earlier R62/52 (different length). I thought R12 had a guide fitted where this bush fits and a smaller diameter cam follower runs in this guide. If you remove the R12 barrels can the cam follower slide out like the early models?