If some nancy boy tells you they are for two men only tell him
to stop watchings soaps and eating bon bons all day.
Another large motor is the Titan twins @ 293cc 17 cubes.
Disston DA 211...65 lbs with 36" bar
I can vouch for the the DA211. I remember as a kid, maybe 10 or 12, sending our 211 up big trees to my Dad. I still have it and it's got good compression, Joe.
IEL PT-ST 160cc, 62 lbs with 40" bar