An older leaf blower (brown & tan Ryan model) was disassembled for parts.
Here are some pictures showing typical construction of the small 2-stroke weed eater & leaf blower motors.
 

Single sided crankshaft & counter balance

 

Single ring on the piston

 
 

Steel laminated counterbalance
Note the connecting rod - two stamped steel plates fused together

 

Caged roller bearings at each end (I assume the top end is) of the con-rod
Piston ring is siezed allowing for a decent amount of blow-by