Is a 1991 Honda 250 x 4 wheeler a 2 stroke or 4 stroke?

It should be a 200cc Blaster and that would be a 2 stroke. Here is a easy way to tell if a ATV or dirt bike is a 2 or 4 stroke motor........ Look at the exhaust pipe where is comes out of head. If it goes it a really fat pipe it is a 2 stroke like a big bubble. If the pipe stays a small dia. to muffler its a 4 stroke hope this helps.

Sorry I see its a Honda a 250R its still a 2 stroke