As I stated before: if one transmits on, say, 119,000 Mhz with a 25 KHz filter than one will also be received/heard on 119,0 - 8,33 and 119,0 + 8,33 - which is not what is intended.
Are you sure? The bandwidth of the transmitted signal is about 6kHz and a reasonably modern 25kHz radio would not interfere with the adjacent .833 channels.