EMAX ECO II Series 2207 Motor 4S 2400KV Brushless Motor for FPV Racing Review (2026)

Who it is for

The ECO II series targets budget conscious FPV pilots building or repairing a 5 inch freestyle quad who want a dependable motor without paying premium motor prices. Because this specific version is rated at 2400KV for 4S power, it suits pilots committed to 4S battery setups rather than those planning to run 6S, since the KV rating is matched to that voltage range for the intended throttle response and RPM. EMAX's wide dealer network and parts availability also make this a practical choice for anyone who wants to be able to source spare bells or replacement motors easily after a crash.

Build and materials

The motor uses N52SH arc magnets, an upgrade over the magnets in EMAX's earlier ECO line, intended to deliver stronger torque, quicker throttle response, and higher achievable RPM. A steel shaft rides on precision bearings, with the whole unit anodized and finished with a mirror polish, and the motor uses a 16 by 16 millimeter mounting pattern that matches the standard bolt spacing on most 5 inch frames. Multi strand winding using 20 AWG silicone wire connects the motor to the ESC, a detail that affects flexibility and durability of the motor leads during a build.

Performance for freestyle

On 4S power, a 2400KV motor in the 2207 size class delivers crisp, punchy throttle response suited to freestyle flying, where quick direction changes and snappy power delivery matter more than outright top speed. This pairing sits at the higher KV end of what is comfortable on 4S, giving a lively feel without pushing into the RPM ranges that would call for a lower KV or a 6S battery instead. Pilots who want a more relaxed, less twitchy feel on 4S may prefer a lower KV variant within the same ECO II line rather than this 2400KV option, while pilots chasing sharper punch outs will likely appreciate the extra headroom this KV provides.

Where it fits in the lineup

As part of EMAX's budget ECO II line rather than its higher end motor series, this model trades some of the refinement, consistency, and premium bearing quality found in pricier motors for a lower price point, which is a reasonable tradeoff for pilots who crash often and would rather replace an affordable motor than repair an expensive one. The 4S specific 2400KV rating also means this exact motor is not the right choice for anyone building around 6S power, where a lower KV variant from the same ECO II family would be the correct pick instead. Matching all four motors on a build to the same KV and voltage rating avoids uneven thrust across the frame.

Bottom line

For 4S freestyle builds on a budget, the EMAX ECO II 2207 2400KV offers a solid balance of throttle response and affordability, backed by N52SH magnets, a steel shaft, and EMAX's wide parts support. It is not a premium motor and does not aim to be, so pilots chasing top tier bearing quality and consistency across a full quad's motor set may want to look at higher priced options. Within the budget freestyle motor category, though, it remains a sensible, easy to source choice for pilots who crash regularly and want a quick, affordable replacement on hand.

Frequently asked questions