Jul 23, 2015  The updated Honda PCX and the new Yamaha SMAX go headtohead to see which is the better 150cc scooter the smallest highway legal scooter displacement. The tank capacity was bumped by half a gallon to 2. 1 gal. , providing a nice increase to the PCXs range to 200 mi. , based on our tested 95. 4 mpg. Since thrifty transportation is what