Features AXE 540L 2800KV R2 Motor. AXE R2: 540 / 540L / 550. Technical Specifications AXE 540L 2800KV R2 Motor. Features XeRun AXE Plus R3. Only compatible with Xerun AX "R2" and "R3" motor series. Technical Specifications XeRun AXE Plus R3.
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