Did you have the powertest done before _and_ after?
The drivetrain gobbles up quite a bit of power and the power in the
datasheet (90 HP) usually is the one delivered by the engine (DIN says
with auxiliaries) and _not_ the one at the wheels (Assuming that you
only have the wheel value available)
So, considering this, I would estimate that your poweroutput at the
engine is now something like 120 or more. Motorcycles loose something
like 10 to 15 HP from engine to wheel. Cars with the shaft drive and
lots of angled gearing loose much more.
Maybe I'm wrong, but the information you provide is not complete, sorry.
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