Rear gear recommendation for highway.....

Teener=318
1969 teener cam spec; 240/248/114.. lift of .373/.399

All SB Mopes could benefit from a close-ratio gearset.....
In a 5 speed flavor.
3.09-1.92-1.40-1.09-.69 w/splits of .62-.73-.78-.63 to be used with a rear of 3.55
The 10.97 starter gear is very nice.and the 2.45 would be a fine cruiser, making 65mph=2000rpm. Perfect for a 230*cam
Or something similar