Apollo 250rx build help.

[Scarestone]

Hey! I’m new to bikes so there’s a lot I don’t really understand completely. I’m deeply into cars and always working on them. So staying “stock” is just not something I can ever seem to do. I’m not trying to fly around a track. Just need links to upgrades that are smart to do. I really do like the bike so I’m trying to keep it going for as long as possible. If you could also leave me a link to the “upgrade” I would appreciate it! Thanks.