HP simply isn't a meaningful number for a jetski, and here's why: HP is calculated by multiplying RPM with the torque a motor produces at that RPM (times a constant factor).
What's that mean?
It means that the HP numbers you see advertised for any motor are always going to be near the redline of the motor, at high RPM. That's useless for a standup motor.
We use power at the low and mid RPM's, not in the 7000's.
The stock SJ motor might have 73HP at 6000RPM. Who rides there????
At usable RPMs it probably has 20-35HP.
The big & strung up motors? The claimed 101HP motor from the FPP graph in the last thread had about 50HP at 5000 RPM and even less down low.
A motor with a transmission attached to it can operate inside a fairly narrow RPM band to be near peak RPM. Direct drive jetski, not so much. Because of that, our power curves are much wider than they are for other motors. And that also gives up peak HP.