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Reedy Sonic 540-M3 Modified Brushless Motor (7.5T)

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Reedy's Sonic 540-M3 Modified Brushless Motor appears very similar to the Mach 2 on the outside, but a closer look shows that this is a completely unique motor and nothing has been carried over from the previous model. A 3-piece CNC machined can reduces weight while improving airflow, component fit, and bearing alignment. Heavy-duty silver-plated solder tabs are not only thicker to reduce resistance, but are also cupped to aid soldering, and are well supported to prevent internal connections from fatiguing over time.

Inside, the changes are less obvious, but result in huge performance gains that are much more noticeable. An updated stator design improves mid-range feel which both on- and off-road racers will appreciate. Maximum power output and RPM are provided by way of this stator, pure copper magnet wire, and low-resistance collector rings. A balanced, high-strength sintered rotor provides powerful, fade-free performance thanks to improved manufacturing processes. To fine-tune for specific applications and tracks, a variety of optional rotors are available. Lastly, larger precision stainless steel ball bearings have been fitted to accommodate high RPM loads with improved reliability.

Modified class racing is about controlling power. Sonic motors have always been known for their linear power delivery and the 540-M3 does not disappoint.


  • CNC machined, lightweight 3-piece can
  • Aluminum end cap
  • Low-resistance, silver-plated solder tabs
  • Optimized air cooling
  • Dual-precision ball bearings
  • Balanced rotor
  • High-strength magnet
  • Adjustable timing
  • Completely rebuildable
  • Competition proven
  • Built to ROAR/EFRA/IFMAR specs

Cells: 1-2S LiPo
Diameter: 35.8mm
Length: 52.7mm
Shaft Diameter: 3.15mm
Weight: 170-176g

This product was added to our catalog on August 25, 2015

Verified Owner
Tuesday, Nov 10 2015 (about 4 years ago)
Reedy Sonic 540-M3 Modified Brushless Motor (7.5T)
I uses b5m.

Very smooth. Motor heating is also suitable.
Sunday, Nov 20 2016 (about 3 years ago)
Reedy Sonic 540-M3 Modified Brushless Motor (7.5T)
Love this motor. Run it in my SC5M for dirt oval paired with my Hobbywing XR8 SCT esc and performs great. Lots of straight away speed and runs cool with a Maclan Racing fan. I am still working on the timing and i am going to run it with a 13.0mm rotor on smaller tracks, cant wait to really wake this baby up and find its sweet spot.