a normal aspirated Rotax 912. During the static run up the rpm reaches approximately 2100rpm (red line 2385) at full thottle
That must be one very sick 912 - mine redlines at 5600 rpm. Not sure I'd even try to take off on yours.
As for the manifold pressure: I can't remember ever seeing such a gauge in a Rotax-powered plane, though of course it is not impossible to install.