YuXiang F112S Main Motor Set Brushless Motor & Shaft for AH-1 Cobra RC Helicopter

Restore Full Lifting Power, Fix Motor Overheating, and Eliminate Main Shaft Wobble

A burnt-out, power-fading, or seized main motor on your YuXiang F112S AH-1 Cobra RC Helicopter severely cuts rotor RPM, leading to unsafe altitude drops, high power drain, or complete in-flight shutdown. Severe rotor impacts during crashes can also bend the main shaft or damage internal brushless motor bearings, causing heavy powerhead vibrations that confuse optical flow and GPS stabilization sensors. Finding compatible direct-drive brushless motors with exact shaft length and mounting tolerances is difficult. This official YuXiang F112S Main Motor Set directly restores factory flight efficiency and power. Featuring a high-torque brushless motor pre-fitted with a precision main shaft, it provides smooth, low-noise power delivery directly to the main rotor system without gear slip or power loss. Ships worldwide.

Product Highlights

• High-Efficiency Brushless Direct-Drive Motor: Delivers smooth, instant torque and high thermal efficiency for stable head speeds during scale 3D and GPS hover flights.

• Straight Hardened Main Shaft: Pre-aligned main shaft ensures zero axial runout, suppressing drivetrain vibration to protect gyro and GPS sensor data.

• Direct-Fit Plug Harness: Pre-wired with original factory gold-plated motor connectors for instant, solder-free connection to the ESC/receiver system.

• Complete Replacement Power Kit: Includes 1x Brushless Main Motor, 1x Integrated Main Shaft, and 1x Hex Socket Cap Screw for secure installation.

Compatibility

For the YuXiang F112S 9CH GPS RC Helicopter only.

Full model page (specs & photos):

https://kadstoylover.com/en-us/products/yuxiang-f112s-9ch-gps-rc-helicopter

What’s in the Box

• 1 x YuXiang F112S Main Motor Set

Install Tips

• Removing Damaged Motor & Shaft: Disconnect the motor wiring leads from the main board, loosen the main shaft retaining hardware, and carefully slide the worn motor unit out of the frame.

• Seating New Brushless Motor: Position the YuXiang F112S Main Motor Set into the main frame motor bay, ensuring proper clearance around internal wiring and frame walls.

• Securing Main Shaft Fastener: Align the main shaft cross-hole with the upper drive/hub assembly, thread the included hex socket cap screw through, and tighten securely using threadlock.

• Pre-Flight Rotation & Power Check: Plug the motor leads into the ESC, spin the rotor head by hand to confirm smooth bearing rotation, and perform a low-throttle spool-up to check for vibration-free power delivery.

More Spare Parts & Accessories

Support & Warranty

• 3-month warranty on manufacturing defects
• Ships worldwide