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The Avinox M2 and M2S are the proper next-gen evolution. M2 puts out 125Nm/1100W at 2.65kg, while M2S steps up to a frankly silly 150Nm/1500W and is actually lighter at 2.59kg thanks to flat-wire winding. Both ditch the M1's noise issues, run sealed bearings with 41% less drag, and share the M1 mounting pattern so frames can be updated without a full redesign.
Here's what's confirmed in the database with M2 or M2S motors: