Scorpion HKII-4525-520KV – ULTIMATE (6mm 55mm)This is the second generation of HK 4525 series. In September of 2010, Scorpion released the first HK 4525 520kv Limited Edition motor. Since that date, the HK 4525 has been the motor of choice for 700 class RC helicopters, and has become the performance benchmark for every other model motor manufacturer. Eighteen months later, in April of 2012, we released an improved version of this motor, the HK 4525 520kv Ultimate Edition. Since then, the Ultimate

Carbon fiber tail blade x 2

●Socket Screw x 6(M2

and single strand winding technique on this size of motor

1 Geometry when used with NME Grip Arm

132-117-B Helical Main Gear 117t - Pack of 1

2 x 0868-41

●Weight:90

•Belt Guide（rear）（1PSC）

The second generation of the O

Scorpion Ratchet Screw Driver

Metal bearing holder(30x35x7mm) x 2

The cooling shaft is designed in such a way that the cylinder head of the engine is completely encapsulated and is completely surrounded by the cooling air flow