Slot Car Corner "Gator" short-can motor, endbell drive, single splined shaft (2.0mm diameter, 10.0mm length). The splined shaft can be used with plastic or brass pinions. Rated at 18,000 RPM (12 VDC) and 105 gcm torque, the Gator is a perfect replacement motor for stock Scalextric, FLY, etc. motors at a very affordable price.
Home Racing World (HRW) recently tested the Gator motor - click the link below to see what they had to say.