The simple way to adjust power valves with a home made harness that costs 2 dollars. “Pic1” shows a 12 volt lawn mower battery and a harness with a 10 amp fuse. At the ends of the wires I put 2 basic crimp connectors with flattened wire. This is so it can be incerted easily into the servo test port. “Pic2 (way out of focus) is the test port located between the servo motor and the steering hoop. It has 3 openings but only 2 wires. With the key “OFF” Put the hot wire (Red) from the “+” side of the battery to the red wire on the test port and the ground wire (Black) from the “-“ side of the battery to the black wire on test port. “Pic3” shows where the gap you are adjusting. It’s the gap between the 2 bolt cover and the 4 bolt cover. This is where you want to maintain a 2.0 to 3.5mm gap. Loosen the 2 bolts and back them out, as you loosen the bolts the spring inside the cover should be opening the gap. “Pic4” shows the servo motor. Take out the 3 screws that hold the cover on the servo so you can see what’s going on in there. At this point I loosen the cables by screwing them into the servo so there is slack when the servo activates. Now I turn the key “ON” and you will hear the motor activate. Using an allen wrench as a measuring tool (2.5mm) adjust the gap between the housing in “Pic3” by tightening or loosening the cables in “Pic4”. Don’t tighten the cover onto the allen wrench, just adjust enough so the allen wrench can feel drag when pulled out. I included a pic of the Yamaha procedure in “Pics 011” Do the same for all 3 cables and valves. Put it all back together and you are ready to go. The first time you do this it may take a little while but after that it’s a 5 minute job. I hope this helps some people out. Please chime in if I missed something.