Based on personal experience hunting the Pittman used in the K27 it is likely a 'custom' motor for Bachmann (Kader). They are NOT friendly about sharing that information.
If you can find one not in an engine and measure it you can likely find one that is close enough in the Pittman catalog to work.
Good luck. Bob C.
If you can find one not in an engine and measure it you can likely find one that is close enough in the Pittman catalog to work.
Good luck. Bob C.