EMAX ECO II Series 2207 Brushless Motor 1700KV/1900KV/2400KV for FPV Racing Review (2026)

Who this motor is for

The ECO II 2207 suits FPV builders assembling a 5 inch freestyle or racing quad who want a well established, budget friendly motor line with a track record rather than a newer or more expensive alternative. Offering 1700KV, 1900KV, and 2400KV versions in one listing lets builders match the motor to their battery setup, whether that is a higher voltage 6S pack or a lower voltage 4S setup, without hunting across separate listings. Because EMAX is a long standing brand with wide spare parts availability, this motor also suits pilots who crash often and want to be confident replacement bells and parts will still be in stock later.

Specs across the KV options

According to the manufacturer's specifications, the 1700KV and 1900KV versions are rated for 3 to 6S batteries, while the 2400KV version is rated for 3 to 4S, so buyers need to pick the KV that matches their intended battery voltage rather than assuming all three work identically across the same cell range. The motor uses a 12N14P stator configuration with a stated length of 33.2mm and diameter of 27.5mm, and weighs approximately 33.4 to 33.6 grams depending on KV, not including the silicone motor wire. It is designed around 5 to 5.5 inch propellers, matching standard freestyle and long range frame sizes.

Build details

EMAX describes the ECO II as using an aerodynamically shaped, rounded bell design along with a reinforced structure and a mirror polished finish, intended to improve durability and reduce vibration compared with the earlier ECO line. The manufacturer states it uses N52SH grade arc magnets and a tighter air gap between stator and magnets, which is described as improving RPM headroom, throttle response, and torque relative to standard magnet grades. For the 1700KV version specifically, EMAX lists an idle current of 1.24A at 10V and an internal resistance of 72 milliohms, giving builders concrete numbers to compare against other motors in this size class.

Trade-offs and how it compares

Against the Axisflying 2207 at 1960KV for 6S builds, the ECO II offers a longer standing track record and broader community familiarity, while Axisflying markets itself on more aggressive performance claims for competitive racing. Compared with budget generic options like the FPVDrone 2207 2400KV motor, the ECO II carries a stronger reputation for consistent quality control and more readily available spare parts, which matters for pilots who crash and rebuild often. Pilots specifically chasing the lowest possible weight for competitive racing may find dedicated lightweight race motors shave a few grams over the ECO II, though at a higher price and sometimes shorter parts availability.

Bottom line

The EMAX ECO II 2207 remains a sensible default motor for freestyle and general purpose 5 inch FPV builds thanks to its proven design, reasonable price, and wide spare parts support across many retailers. Picking the correct KV for your battery voltage is essential, since the 2400KV version is limited to 3 to 4S while the 1700KV and 1900KV versions handle up to 6S, so double check the listing variant before ordering a full set of four. For most builders who are not chasing the absolute lightest competition setup, this motor line offers a dependable balance of performance, durability, and value that holds up over repeated crashes.

Frequently asked questions