I have the same shape bike. Bought it way back in early 2006. Tuned the engine only 2 times since then, still has that pick. Had 2 accidents thanks to my brother but this bike is made tough, broke the front wind visor and odometer cluster. Took those off now the bike looks like a cyclops.
Even now my ZXMCO 70 cc still has that red shine of the fuel tank.
Just take care of it the oil,filter, clean fuel filter, brakes and ride responsibly. This machine is great.