How do you tell if your 50cc moped is a 2 stroke or a 4 stroke?

To determine if your 50cc moped is a 2-stroke or a 4-stroke, check the engine design and oiling system. A 2-stroke engine typically has fewer components, no separate oil reservoir, and requires mixing oil with fuel. In contrast, a 4-stroke engine has a separate oil system and usually features a valve train with camshafts and timing mechanisms. Additionally, you can consult the owner's manual or look for identifying marks on the engine.