So, I never seen that on any other RZ before but I wanted the
YPVS to stand out on the engine. Here's how I've done it.
1. Tape both side of the head and carefully cut each letters (I used transparent silicone tape to facilitate cutting).
2. Using permatex bronze (very high temp) fill all letters on both sides.
3. Scrape the excess right away (keep your tape larger than seen on this picture, see the picture 2 above for a good example)
4. Remove the masking tape and let dry at ambiant temperature for 6 hours
5. Carefully remove the letters (now feels like soft rubber) and cook them at 375F for an hour. Don't cook them on the head because they will stick hard, ruining the job. Also keep track from which side they were casted.
5. Mask the body of the head and power coat each side in red. Prior to my final attempt, I had done just the letters in red but I ended up with unpainted gap between the black and red at some places and had to redo the job.
6. Use a sand block to sand both side in order to prepare for the black coat but leave enough red around the letter to ensure no unpainted gaps remain.
7. Mask the head as appropriate and cover the YPVS using the casted letters (in permatex).
8. Powder coat the black layer, place in oven. Then as soon as the powder has flowed on the head, open the oven and remove the permatex letters using a sharp object and your fingers (if you don't remove them when at that point they can slowly fall from their place causing a bad paint job) and then continue cooking the paint for the appropriate time. Tadam!