Arrma BLX 4074 4-Pole 6S Brushless Motor (2050kV)

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Arrma BLX 4074 4-Pole 6S Brushless Motor (2050kV)
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Price: $126.99

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The BLX 2050kV brushless motor provides speed and torque and is perfectly balanced for use with the Arrma BLX185 ESC unit.


  • A beautifully etched black aluminum motor can provides a premium look, whilst a 4 pole internal configuration keeps the power supply smooth and consistent.
  • Gold bullet connectors provide fast and easy wire removal when you need to clean down your vehicle.
  • The aluminum motor can provides increased heat dissipation from the finned body section.
  • A dual motor shaft flat section provides a safe and secure pinion gear fitting.

Motor Type:
Motor kV (# of Turns for brushed): 2050kV
Poles: 4 Pole
Motor Length: 74mm / 2.91"
Diameter: 41.7mm / 1.64"
Shaft Length: 18.5mm / 0.73"
Shaft Diameter: 5mm / 0.2"
Motor Mounting Hole Diameter: M4
Motor Cable Length (Including Connector): 65mm / 2.56"
Motor Connector Diameter: 4mm / 0.16"
Motor Weight: 399.5g / 14.09oz

This product was added to our catalog on April 13, 2017

Tanner Haslam
Tuesday, May 19 2020 (about 3 years ago)
Arrma BLX 4074 4-Pole 6S Brushless Motor (2050kV)
THIS THING IS AMAZING!! I’ve had it running in a e-maxx (don’t hurt me) for about 2 years now, and it still works amazingly. With correct gearing it will easily hit 60mph! I’m not sure how you could kill this motor, the whole thing is aluminum, it’s never stopped working, shorted, or done anything bad. I’ve jumped it 20+ feet in the air, fully submerged it, landed the car upside down on it, and it still is alive. I’m not sure how it is but it still is alive!! If you’re looking for a nice, high power brushless motor, this is it!!!
Paul Krebs
Verified Owner
Friday, Apr 23 2021 (about 2 years ago)
Arrma BLX 4074 4-Pole 6S Brushless Motor (2050kV)
Replacement motor after almost 2yrs. On the first one. I would have to say pretty good motor, I ran more than 350 sets of batteries ( 2-3s 5200 mah) at the track. It was time for a new one, even though the one still runs good, a little sloppy.
Robert Hurley
Verified Owner
Thursday, Nov 5 2020 (about 3 years ago)
Arrma BLX 4074 4-Pole 6S Brushless Motor (2050kV)
Performance equals original motor, the old motor pinion gear set screw socket rounded off and was drilled out. Perhaps the wrong loctite contributed to the failure.
Layne Johnson
Verified Owner
Thursday, Jul 30 2020 (about 3 years ago)
Arrma BLX 4074 4-Pole 6S Brushless Motor (2050kV)
It's a motor the truck calls for and it works just like the factory motor.
mark hufnagel
Verified Owner
Friday, Mar 20 2020 (about 3 years ago)
Arrma BLX 4074 4-Pole 6S Brushless Motor (2050kV)
great motor for performance , but it doe,snt last long. This is my third motor for the kraton ! What suck,s about arma is there is no after market suport !!! A Castle motor or a Teken motor would out last the arma motor !! When I take apart the arma motor I see the armature is wraped in some cheap ass fiber paper that does,nt stand up to dirt or heat. BOTTOM LINE IS THE ARMA MOTOR IS A PIECE OF SHIT!