25 class locomotives were originally meant for shunting. This were actually ordered by Egypt for their railways. Then they cancelled their order, which made GM look for a new buyer. KTMB agreed to buy them because they are facing shortage shunters. The first batch arrived in 1991. KTMB was surprised with their realiablity. They placed a second batch of order which arrived in 2002. 25 class engines are still the most reliable in KTMB's fleet. The YDM proved to be more reliable but then again those engines are leased from Ircon. I haven't been able to collect any technical data, will update this page soon with those info.