From Reedy:
Fine-tune your Reedy Sonic 540-M3 for varying track conditions and applications with a powerful assortment of optional rotors. Each rotor is laser etched with its specification and part number for easy identification and technical inspection.
In addition to optional rotors, Reedy offers a variety of spare parts to keep your motor performing as well as it did when it was new.
540-M3 Spec Rotors
271 – Reedy 540-M3 Spec Rotor, 12.0 x 7.25 x 25.3
272 – Reedy 540-M3 Spec Rotor, 12.2 x 7.25 x 25.3
273 – Reedy 540-M3 Spec Rotor, 12.5 x 7.25 x 25.3
540-M3 Mod Rotors
274 – Reedy 540-M3 Mod Rotor, 12.3 x 5.0 x 25.3
275 – Reedy 540-M3 Mod Rotor, 12.5 x 5.0 x 25.3
276 – Reedy 540-M3 Mod Rotor, 13.0 x 5.0 x 25.3
540-M3 Spare Parts
277 – Reedy 540-M3 Stainless Steel Bearing Set (2)
279 – Reedy 540-M3 Sensor Assembly
280 – Reedy 540-M3 Rotor Spacer Set
281 – Reedy 540-M3 Case Screws with Insulator
282 – Reedy 540-M3 Motor Mounting Plate SS (with bearing)
283 – Reedy 540-M3 Motor Mounting Plate (with bearing)