4 stroke engines all the same?

[CheviRyder]

Hey guys/gals, I’m new to the forum and I’m sure there’s a couple discussions on this topic but I’m gonna open it back up. I’m here to talk about 4 stroke engines, I have a 2002 Suzuki Ozark 250, my first actual ATV. Anyways I’m wondering if all 4 strokes from Honda, Yamaha, Kawasaki, Suzuki, can-am, and Polaris, are the same set up, just different CC’s

[davefrombc]

All  their engines  are  similar but their   transmissions and drive systems can have significant  differences  Some  have  gears and clutches ,  both manual  and automatic  and some use  a  belt drive and 2  variable  clutches  to  create  a Continuously Variable Transmission type of  automatic.

[Ajmboy]

I added a bit to your topic title to be more descriptive. @davefrombc gave a great answer. Some manufacturers also share engines and engine components. The principle behind a 4 stroke engine and how they function are all the same. You may find similar or even same parts between manufacturers if they contract their engines out to lets say suzuki or their is ownership over the brand.