help me find parts for this
 

My friend just got this spree given to him. No plastics runs like crap. Im having problems finding a parts store or if theres another engine that the parts would fit this. The engine is afo5e 2t 50cc. Performance parts would be awesome Help me dawgs!

Pic of engine #
http://i.imgur.com/d8LBaeW.jpg

Is that big enough to see? Lol geez