Sport Cub 500 Gearbox Set Reduction Gear for VolantexRC 761-4 Trainer Airplane

Restore Full Propeller Thrust, Fix Stripped Spur Gears, and Eliminate Motor Shaft Binding

A cracked gear housing, stripped reduction spur gear, or bent drive shaft on your VolantexRC Sport Cub 500 (761-4) Trainer Airplane severely limits motor power transfer to the propeller. Hard nose-first landings and accidental ground strikes frequently strip micro gear teeth or push the drive shaft out of alignment, resulting in loud grinding noises, severe vibration, or total loss of thrust during flight. Installing generic gearboxes often leads to improper gear mesh, overheating coreless motors, or loose prop saver fitments. This official Sport Cub 500 Gearbox Set resolves gear stripping and drive misalignment completely. Engineered to exact factory tolerances, it restores quiet, high-efficiency power reduction, ensuring smooth throttle acceleration and reliable prop saver performance.  Ships worldwide.

Product Highlights

• Factory-Optimized Gear Mesh: High-precision nylon spur gear delivers smooth torque transfer with minimal gear friction and reduced motor strain.

• Durable Hardened Steel Output Shaft: Resists bending during minor nose impacts to maintain true propeller rotation without binding.

• Integrated Prop Saver Mounting Hub: Seamlessly pairs with the original Volantex prop saver pop-off adapter to protect blades during crashes.

• Direct EPO Foam Compartment Fit: Precision-molded outer housing seats perfectly inside the Sport Cub 500 front cowl without cutting or modifying foam.

Compatibility

For the VolantexRC Sport Cub 500mm 4-Channel RC Trainer Airplane only.
Full model page (specs & photos):

https://kadstoylover.com/products/volantexrc-sport-cub-500mm-4-channel-rc

What’s in the Box

• 1 x  Sport Cub 500 Gearbox Set

Install Tips

• Removing Worn Gearbox Unit: Peel back the nose cowl foam section, disconnect the motor leads from the receiver board, and slide the damaged gearbox assembly out from the fuselage nose mount.

• Seating New Gearbox Assembly: Position the Sport Cub 500 Gearbox Set into the front foam bay, ensuring the outer housing sits flush and parallel to the aircraft center line.

• Securing Motor & Wiring Harness: Align the coreless motor firmly inside the gearbox housing, connect the wire plug to the mainboard socket, and secure the foam cowl using foam-safe glue.

• Pre-Flight Spin & Prop Saver Test: Attach the prop saver adapter and blade onto the shaft, then spin the propeller by hand to confirm smooth, whisper-quiet gear rotation before applying throttle.

Support & Warranty

• 3-month warranty on manufacturing defects
• Ships worldwide