Permanently spawns in front of the bike school in Blackfield once you achieve Gold medals in all tests. Alternative: Spawn a Different Bike
Its high power can lead to unwanted "wheelies" if you are not careful with the throttle, which may affect steering at high speeds. Where to Find the NRG-500 (No Cheats Needed) Gta Sa Nrg 500 Cheat Code Pc
Since there is no spawn code, you can find the bike at these guaranteed locations: Permanently spawns in front of the bike school
If you just want a fast ride immediately and don't mind a different model, you can use the cheat code for the : PC Code: FOURWHEELFUN or AKJJYGLC . watch this tutorial:
For a visual guide on exactly where to find the NRG-500 at the very start of the game, watch this tutorial: