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Scorpion HKII-4225-810kv Limited Edition (6mm 32mm)-Mad 4 Heli SALE
Scorpion HKII-4225-810kv Limited Edition (6mm 32mm)-Mad 4 Heli SALE
Scorpion HKII-4225-810kv Limited Edition (6mm 32mm)-Mad 4 Heli SALE

Scorpion HKII-4225-810kv Limited Edition (6mm 32mm)

$299.99 AUD $373.99 AUD
SKU: HKII-4225-810kv

Scorpion HKII-4225-810kv Limited Edition (6mm 32mm)

Product Description

With the trend of ultra light weight 700 size models running 6-8s batteries on the rise, the market called for a light weight, powerful, but not battery puffing motor. So Scorpion created the HKII-4225-810kv motor for a Limited Edition run! Sized directly between our proven HKIV-4025 and HKII-4525 motors in terms of weight and power, and LIGHTER yet MORE powerful then our competitors 4030 motors, this motor represents the most technologically advanced power source ever offered for an electric helicopter.

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Plated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 1-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 1-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

*This motor is using 30mm bolt spacing on the mounting

HK Patent No. : HK1141674

China Patent No. : ZL2010 2 0298704.9

Taiwan Patent No. : M399539

U.S Patent No. : Pending

All Others Worldwide Patent : Pending


Stator Diameter 42 mm (1.65 in)
Stator Thickness 25 mm (0.98 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wire 1 Strand / 1.6mm
Motor Kv 810KV RPM/Volt
No-Load Current (Io/10V) 3.60 Amps
Motor Resistance (RM) 0.009 Ohm
Max Continuous Current 115A
Max Continuous Power 3404 Watts
Weight 393 Grams (13.77 oz)
Outside Diameter 52.3 mm (2.06 in)
Shaft Diameter 5.98 mm (0.24 in)
Body Length 51.50 mm (2.03 in)
Overall Shaft Length 85.5 mm (3.37 in)
Max Lipo Cell 8s
Max Peak Current 170 Amps (5 seconds)
Max Peak Power 5032 Watts (5 seconds)
Motor Timing 5deg
Drive Frequency 8kHz

Included in the Box

1 x HKII-4225-810kv Motor
3 x 4mm AMASS Female Bullet Connectors
3 x Heat Shrink
4 x M4 Mounting Bolts
3 x Scorpion Stickers