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MARCOSCESAR Agrego mas experiencia por el uso: El piñon principal que viene de plastico se me gasto muy rapido. Seguramente una piedrita o mugre entro entre del piñon principal y piñon del motor. Si el piñon principal hubiera sido de metal...esto no pasaba. Dicho esto, considero que la actualizacion al piñon principal de metal es necesaria. Es una lastima que banggood ya no la venda ya que considero que es un upgrade necasario y muy importante.