What types of bearings are used in a 2-stroke engine for model aircraft?

[Precursor]

I was taking apart a 2-stroke engine for a model aircraft and I'm a little confused about the types of bearings used for the connecting rod and crankshaft. So far, I know of the journal, needle, tapered roller, ball, and angular contact ball bearings.
Does the connecting rod use a journal bearing or a needle bearing, or a combination? Same with the crankshaft. Which does it utilize?

Any help is appreciated.

 

[mender]

Most small model airplane engines use a plain bearing for both positions. Easiest way to tell what was used is to look.

 

[Danger]

That vast array of listed bearings is messing me up. I'm used to 4-stroke engines, where everything is crush-fit bushings. (With the exception of specialty items such as roller rockers, which have needle bearings.)