GEPRC SPEEDX2 1404 3850KV Motor

The GEPRC SPEEDX2 1404 3850KV is a high-efficiency brushless motor engineered for sub-250g FPV builds, including 2.5-inch to 3.5-inch cinewhoops, lightweight micro toothpicks, and 4-inch micro long-range cruisers. Operating optimally on 3S to 4S LiPo power, this 3850KV rating strikes an ideal balance between low-end torque and top-end throttle response without excessive current draw.

Key features

• High-torque rotor design: Utilises N52H curved arc magnets inside a 9N12P stator configuration to deliver rapid, linear throttle response across the RPM band.

• Durable construction: Machined from 7075-T6 aircraft-grade aluminium, keeping total unit weight to just 10.1 g with silicone lead wire attached.

• Universal micro mounting: Features a standard 9x9 mm (M2) base pattern and a 1.5 mm T-mount shaft for seamless installation on modern micro frames and propellers.

• Thermal management: Large cooling cutouts across the bell improve air ventilation and maintain consistent stator temperatures during aggressive throttle punch-outs.

Specifications

• Model: SPEEDX2 1404

• KV rating: 3850 KV

• Configuration: 9N12P

• Stator dimensions: 14 mm × 4 mm

• Shaft diameter: 1.5 mm

• Mounting pattern: 9x9 mm (M2)

• Supported input voltage: 3S–4S LiPo

• Magnets: N52H arc

• Weight: 10.1 g (including silicone wire)

For optimal flight characteristics, pair this motor with a 20A to 35A all-in-one (AIO) flight controller and lightweight T-mount propellers. It serves as a direct replacement motor for BNF builds like the GEPRC CineLog30 and Smart 35, or as a reliable power plant for custom sub-250g projects.