Freeflow air filters arnt worth it on a 50..not true!!!
..actually, it's one of the first mods to make if you really want to get some performance...
...i put a K&N on my People 50, and increased the main jet to a 96, and gained 7 mph on the flat..
..it will run 60+ mph...
..on my Agility 50 i gained 5 mph with the filter and larger jet, and i've gps'd it at 52mph....
..i ain't in it for the mpg...just the mph.....
peace