Nothing super amazing was done to my ski it's the combo of everything that woke it up from stock. Opened the ports on the cylinders as much as possible ported the exhaust to match for better flow. Shaved the head for higher compression. I run 91 pump gas, Had no desire to go into race fuel. Added a flow control valve so water doesn't go into the stinger for a little more bottom end. I already had a great prop, so the pump was just adjusted for dual cooling and the nozzle was bored and a stubby pump cone added.
The only thing I would change about this ski is adding a b pipe. Other then that I love it. The b pipe will come in good time.