My first YS engine
Use a good quality fuel with a minumum of 18% oil, synthetic will work the best since it will keep the motor nice and clean. Castor has a tendancy to gum up in the regulator.
You can use 15% nitro but you will get much better performance from 20%-25%, or even 30%. Prop the motor so you spin 8500-9000 on the ground.
F plug is a good choice. After break in you will likely need to reset the valves.
Enjoy