Lets see,
using 54 t front sprocket and 13 t rear sprocket (original)
54 tooth/13tooth = 4.15 wheel revs per crank rev x 16"= 66 gear inches
I usually like to keep single speed CB bikes in the 50 gear inch range.
So if you changed out your front sprocket with a common 44 t:
44 tooth/13tooth = 3.38 wheel revs per crank rev x 16"= 54 gear inches
A Wally world kids bike 32 t sprocket would yield a nice around town hill climbing ratio:
32 tooth/13tooth = 2.46 wheel revs per crank rev x 16"= 39 gear inches
Sport Touring Steep hills 27-37
Medium hills 32-42
Flat 37-47
Road Racing Steep hills 47-60
Flat to rolling 57-66
Mtn bike Steep hills 17-20
Technical trails 17-20
Dirt roads 20-27
No problem. I think some of these bikes came incredibly tall geared from the factory. Maybe that's why we find them in good shape sometimes - they just were to much of a workout to ride!