Go ride it and see if hits 53-55. You should feel a power band kick in. if you don't feel it you have issues with the power valves. It is common for those to break PV cams and it not be too noticable. Also Make sure when you start it and shut off the servo motor works. they commonly go out on those.
Also those other things just in time talked about.
The machine will spin out on take off if the impeller or packing is bad. Look in the pump for noticable dings on the impeller.