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Viper VX4R51 - 5150kv 550 Sized 4 Pole Brushless Sensorless Motor


Viper VX4 & VX4R

Motor Size Options	540 / 550
Shaft Diameters:	3.17mm / 5mm
KV Options:	3900-5150kv
Poles:	4 Poles Sensorless
Weight:	7.72oz/219g 8.89oz/252g

Viper Copperhead

Continues/Burst Current:	100A/550A
BEC Output:	6V/5A Linear
ON Resistance:	0.0009Ω * 2
Support Motor Type:	Sensorless Brushless Motors
Support Motor Spec	2S Li-Po w/ 540 class: KV ≤ 6000 3S Li-Po w/ 540 class: KV ≤ 4000
Support Vehicle Weight:	≤6 lb
Motor Connection:	3.5mm Bullets
Dimensions:	45.5x39.8x29.25mm
Weight (with battery wires and connector):	96g

Viper Copperhead-R

Continues/Burst Current:	150A/750A
BEC Output:	6V/5A Linear
ON Resistance:	0.0005Ω * 2
Support Motor Type:	Sensorless Brushless Motors
Support Motor Spec	2S Li-Po w/ 550 class: KV≤6000 3S Li-Po w/ 550 class: KV≤4000
Support Vehicle Weight:	≥6 lb
Motor Connection:	4.0mm Bullets
Dimensions:	45.5x39.8x29.25mm
Weight (with battery wires and connector):	98g

The VX4 Brushless motors are available in two shaft sizes and four different KV options for maximum flexibility. 540 and 550 4 pole motor design for maximum power and torque! With the substantial weight of Pro 4 trucks the Viper VX4R.51 and VXR.45 with its 5mm shaft sized are designed and tested for 4wd Pro Short Course trucks. Viper's VX4.39 is 3.17mm shaft size with 3900kv for ultimate high speed runs in 2wd and lighter 4wd applications.

The Copperhead Speed Control comes with preinstalled high capacity bullet connectors for easy installation or removal for cleaning and maintenance. The Copperhead ESC comes preloaded with 6 set profiles. Easily select the profile for your driving conditions, from high speed to just learning. ProGauge (sold separately) programmability for easy editing of the speed controls features.

For gearing reference of different vehicles, please vist the Viper Forum for up-to date details.

Viper VX4 series A01 Instructions Manual
Viper Copperhead ESC series A01 Instructions Manual

Part Name	Part Number
VX4.39 4-Pole 3900kv 540 class brushless motor 3.17mm shaft with Copperhead ESC	6VSVX43901
VX4R.45 4-Pole 4500kv 550 class brushless motor 5.00mm shaft with Copperhead-R ESC	6VSVX4R451
VX4R.51 4-Pole 5150kv 550 class brushless motor 5.00mm shaft with Copperhead-R ESC	6VSVX4R511