HobbyStar 4092 4-Pole Brushless Sensorless Motor, 1/8 Truggy/Monster Truck

SKU: 375-43-CNF

Availability: Out of stock




When too much is just enough, the HobbyStar 4092 is the motor you are looking for.  At a full 92mm in length this is one of the longest and most powerful motors you can shoehorn into your 1/8 truck for ridiculous power (make sure to measure to see if you have the clearance!). 4-pole design and a 12-slot stator provide unbelievable torque. High-quality features like a beautifully machined 6061 T6 billet-aluminum can, buttery-smooth ABEC5 bearings and a 82mm length make this the ultimate motor for your monster truck or truggy.



  • Brushless, sensorless 4-pole motor
  • 12-slot high-torque stator
  • CNC machined 6061 T6 billet aluminum heatsink can
  • High-purity copper windings maximize efficiency
  • High-RPM ABEC5 oversized bearings
  • Universal fit, fits all 1/8 brushless cars, multiple mounting holes with M3 and M4 threads
  • Precision balanced rotor for smooth operation, reliability and maximum RPM
  • Stator-Super Thin (0.2mm) laminations
  • Removable/replaceable rotor
  • Precision engineered for maximum energy conversion


ProductWattsMax VoltageMax AmpsRotor PolesIOResistance KV (RPM/Volt)Max RPMLength (mm)Diameter (mm)Weight (g)Shaft Diameter (mm)Shaft Length (mm)Connectors
4092/2Y 4200 <28 150A 4 2.4A 0.0096 1480 50,000 92 40/42
with fins
530 5 18 6.5mm gold
4092/3T 4200 <26 160A 4 4.8A 0.0058 1730 50,000 92 40/42
with fins
530 5 18 6.5mm gold


Customer Reviews (2)

bang for your buckReview by Laine
rcjuice is my go to site to get motors. all of rc juices stuff is good quality (Posted on 7/13/2018)
BEAST OF A BRUSHLESS MOTOR FOR A VERY VERY REASONABLE PRICE!!! It feels built as good or better than any other motor I have personally ran or checked out before purchasing. In their descriptions I liked how they always keep that "Buttery Smooth Bearing Description", & they're right. You can feel the magnets just fine but I love how smooth the bearings are and aren't putting much strain on the motor at all, to me that's a great recipe for longevity. I have not had it over a month or so, time will tell but it fit perfectly in my BIG ROCK PROJECT I have going on right now. I have ran a HOT RACING 26T and a HOT RACING 22T, BOTH ON 4S & 6S & 8S, right now 6S is still undrivable and I only installed my 2 new 4S batteries to see if I could control it, negative. I am going to extend the chassis as soon as the guy that was making them starts up again really soon, and I am in the process of checking out other rigs A-ARMS that I can get to work to extend the width as well without only using hub extenders. But yeah, enough with my project, I don't believe you can go wrong with this 1480kv like I purchased or the 1730kv, which I know a guy running that in a Kraton, which I own one as well but I am about to start racing it, it's dialed in with the factory motor and ESC, if either go out I will be returning right here to purchase my replacement. Oh yeah, by the way, if anyone is curious which ESC I'M using with the motor, it's the new HOBBY WING MAX6 EZRUN. I kinda wish I had have went sensored just because I don't plan on getting rid of either of these rigs because one you will never be able to purchase again from the manufacturer, and anyone out there with negative comments about about the BIG ROCK, you have no idea how to build your R/C, you have to be told, this truck has so much to work with on top of being brutally tough, I can't break it and I have done my damndest. R/C JUICE, KEEP UP THE GOOD WORK, I ENJOY YOUR VIDEOS AS WELL. GO AHEAD AND HIT ME BACK ON WHICH ESC AND MOTOR YOU WOULD ADVISE ME TO INSTALL IN MY KRATON TO REPLACE THE CRAZY POWERFUL STOCK ELECTRONICS. ALSO, I AM LOOKING FOR A LITTLE BIT OF HELP ON WHICH 2SPEED TRANSMISSION AND A LITTLE ADVISE IF ANYONE ELSE HAS ATTEMPTED IT. One way or another I will make this truck into a rock crawler along with being a badass bashing speed demon!!! (Posted on 3/16/2018)

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Can I get it without the fins? I can only barely fit a 40 size.
The Leopard 4092 does not have fins: https://www.rcjuice.com/motor-esc/brushless-car-motors/1-8-motors/leopard/leopard-4092-4-pole-brushless-sensorless-motor-for-1-8-scale-lightweight-1-5-scale.html
RCJuice answered on January 29, 2018
Will this motor melt a stock 185 Kraton ESC? Thanks for your help!
Yes, the stock Kraton ESC is a good match for this motor.
RCJuice answered on February 18, 2018
When will this be back in stock?
We do not have an exact date for the current shipment arrival but we are looking at 2-3 weeks.
RCJuice answered on December 22, 2017
Would this physically fit in an arrma outcast, and would it work with a blx 200 esc?
Yes, these are incredibly popular for the Arrma
s. The stock ESc will work great with it, but as always it's critical to monitor motor temps and adjust gearing to make sure temps are staying in check with a new setup.
RCJuice answered on October 17, 2018

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