as mentioned i was going about 40-50 km/hour and at this speed the RPM's were reving 5500, just not sure were the unit should rev at certain speeds, I want to be certain unit is running the way it should, I am not a engine guy so just looking for feedback.
The easiest way to judge how well the ski is performing is to see what your rpm's are at top speed. As Doc has stated, your peak RPM's should be around 7400 with a top speed around 55 mph (not kph). Use a gps to determine speed.