my 20'' mongoose zbox build

[ausie battler]

i have sucessfully installed a z box 50cc to a mongoose bmx. after a fair ****fight the whole thing came together quite well and is a great ride. it pulls wheelstands up to about 50kmph and with the custom expansion chamber it tops out about 60kmph. the wheels had to be custom laced from the direct drive hub and front disk brake hub laced to the 36 spoke 20" wheels. by building a custom rear sprocket the bottom end power is enought to drop the clutch and tear off doughnouts and midrange that pulls up jumps or hills easily and strongly.