4 stroke/2 stroke dirt bike?

when it comes to a dirtbike wut kind of regular service would i need to do for a 4 stroker? i had a two stroke before and all i did was change the transmission oil every flike 10 to 15 hours and premixed it. but i dont know alot about 4 stroke maintence. i know theyre more reliable and last longer. i just dont wanna get in over my head with mechanical work or parts money. thanks