KMB Route 51

At that time, the route ran between Jordan Road Ferry Pier and Yuen Long, and was initially an express route, having only two stops between Lai Chi Kok and Shek Kong, which were at Tsuen Wan Town Centre and Tai Mo Shan.

Even so, KMB could not alter the type of bus due to technical problems, and could only increase the frequency of the route as a solution.

After 50M and 68M started service, both using Tuen Mun Road, the role of Route 51 being a main route between Yuen Long and Tsuen Wan diminished, so the northern terminus was changed to Kam Tin on 17 April 1983 with Tsuen Wan bound diverted via Kam Sheung Road.

Later KMB fitted the Cummins engine into more Metrobuses for operating on the route due to high repair frequency of M81-M88.

In 1996, KMB assigned two air-conditioned Dennis Dart buses (AA) fitted with manual decelerators to Route 51.

This has improved connections for West Rail line commuters of Tuen Mun and Yuen Long to Tai Mo Shan Country Park.

The journey distance is 26.5 km in 55 minutes time, via:[1][4] Currently, due to the line serving low populated areas, frequent jockey cars parade the streets occur, except on weekends, when it can reach top gate due to hikers going to Tai Mo Shan (as this is the only public transport to get there).