Re: motor needs replacement . . idk what size to get
Get the 66cc.
But, of course, I'm the guy that would rather put the largest engine in possible.
Your area might be limited to 50cc, in that case get a 48/50cc engine.
2 WHEELS: '11 Huffy Good Vibrations, '11 Skyhawk GT5, 44t, CNSV2, NGK BPR7HIX, Bosch wire, shutupexhaust, 26x1.75kevlar tires, Tektro C230's, new stupid Bell chain