This is tough.
The two oil blow problems I've dealt with have been on my 1150GS where the design doesn't contain the oil in the crankcase when running at very high speeds for extended periods (the 1200 is better in this regard, supposedly), and an oil overfill issue (our doing) on my GF's F650 due to how the engine and oil supply is designed.
I don't know the crank case ventilation system on that bike, sorry.
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