If you have all the vibrations issues taken care of we don't have a problem with them in my area.
Prop dynamic balance, blades of the prop equal in pitch, carb sync, good condition and not old rubber engine isolators.
Some owners do remote mount them on the firewall.
Roger Lee LSRM-A & Rotax Instructor & Rotax IRC Tucson, AZ Ryan Airfield (KRYN) 520-349-7056 Cell
I saw this documentation. Engine works fine, I made carb synch, no abnormal vibrations but anyway I found that one magneto is more rough than second. I have to track it. I'll start with new spark plugs, gaps etc but it's another story.
I'm having the exact same symptom: https://youtu.be/dlYgy7yJcEk
To test the sensor,gauge, grounds, etc I got a manual gauge from the auto parts store and plumbed them both in parallel. The manual gauge exhibits the same behavior and follows the vdo gauge very closely.
According to this, I'm still ok, but its wierd that the pressure drops with an increase in RPM
http://www.experimentalaircraft.info/homebuilt-aircraft/rotax-aircraft-engines-3.php
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