HOBBYWING EZRUN 1/6TH SL 4985-1650KV MOTOR (BLACK) HW30402950

Overview

The Hobbywing EZRUN 1/6th SL 4985-1650KV Motor (Black) is a high-performance brushless motor engineered for 1/6th and 1/7th scale RC vehicles. This sensorless brushless motor delivers exceptional power and reliability, making it an ideal choice for enthusiasts looking to upgrade their RC car UK setup with professional-grade components. Whether you're into high-speed racing on straightaways, pulling wheelies, or powering through the roughest terrain, this motor is built to handle the demands of serious RC hobbyists.

With a 1650KV rating and compatibility with 3-6S LiPo batteries, the EZRUN 4985 provides instant full-torque start-ups and rock-solid stable output that RC car enthusiasts have come to expect from Hobbywing's engineering excellence. This brushless RC motor represents the pinnacle of sensorless motor technology, offering performance that rivals much larger and heavier alternatives whilst maintaining a compact, lightweight footprint perfect for 1/6th scale applications.

Designed specifically for demanding drivers and weekend bashers alike, this ready-to-race motor integrates seamlessly with Hobbywing's EZRUN MAX6 ESC, creating a power system that delivers large torque combined with smooth, linear power delivery across the entire acceleration band. The motor's industry-leading efficiency of up to 90% means more of your battery's energy goes into raw performance rather than wasted as heat.

Key Features

• Brushless Sensorless Design — This motor uses advanced brushless technology without sensors, delivering responsive acceleration and reliable performance without the complexity of sensored systems. Sensorless operation means fewer components to maintain, making this brushless RC motor ideal for both beginners discovering RC for the first time and experienced competitors looking for proven reliability.
• 1650KV Rating for Aggressive Performance — With a 1650KV specification, this motor is tailored for 1/6th scale vehicles and delivers the high RPM output needed for rapid acceleration and competitive lap times. The higher KV rating compared to lower-speed alternatives means faster top speeds whilst maintaining excellent torque characteristics.
• 3-6S LiPo Battery Compatibility — The motor accepts 3S, 4S, 5S, or 6S LiPo batteries, giving you flexibility to scale your power delivery and runtime to match your driving style and track conditions. This broad battery compatibility makes it easy to experiment with different power levels on the same RC car.
• Industry-Leading 90% Efficiency — Hobbywing's temperature control technology and precision engineering deliver an efficiency rate of up to 90%, which is an industry-leading level. Higher efficiency means less heat generation, cooler running temperatures, and longer motor lifespan even during extended racing sessions.
• Thermal Protection and Temperature Control — The integrated temperature sensor and control technology actively protect the motor from overheating damage, automatically managing heat dissipation to prolong service life. This feature is especially valuable during extended use or in hot weather conditions.
• CNC-Machined Hard Anodised Aluminium Case — The motor housing is precision CNC-machined from high-quality aluminium and hard anodised for superior durability and corrosion resistance. This manufacturing process ensures tight tolerances and long-lasting protection against the elements.
• Ultra-Thin Silicon Steel Laminations — These precision-engineered laminations reduce eddy current losses and improve magnetic efficiency, contributing to the motor's exceptional 90% efficiency rating and smooth power delivery.
• Heat-Resistant Oxygen-Free Double-Insulated Windings — The motor's windings are constructed from premium materials with double insulation and heat resistance, providing superior reliability under high-temperature conditions and protecting against electrical faults.
• High-Quality Japanese Bearings — The front and rear bearings (D19×D6×T6) are precision Japanese components that ensure smooth rotor rotation, minimal friction losses, and extended bearing life even under demanding race conditions.
• Polished Alloy Steel Output Shaft — The drive shaft is manufactured from high-quality polished alloy steel, offering superior strength and durability whilst maintaining a lightweight profile. The 5mm shaft diameter is perfectly sized for 1/6th scale applications.
• Explosion-Proof Rotor Design — The rotor features a specially designed structure that provides exceptional strength and stability during high-speed operation, preventing rotor expansion or failure even under sustained full-throttle driving.
• Compatible with EZRUN MAX6 ESC — This motor is specifically designed to pair with the Hobbywing EZRUN MAX6 Electronic Speed Control, creating an optimised power system with excellent torque delivery and smooth, linear power characteristics across the acceleration range.
• 4-Pole Configuration — The four-pole design provides balanced performance characteristics, delivering both responsive acceleration and smooth throttle response that drivers appreciate in competitive 1/6th scale racing.
• 6.5mm Male Connectors — The motor uses standard 6.5mm bullet connectors that are compatible with most major RC ESCs and batteries, ensuring ease of installation and flexibility in your RC car setup.
• Compact and Lightweight — At just 587 grams (20.71 ounces) and measuring only 49mm in outer diameter and 86.5mm in length, this motor adds minimal weight to your 1/6th scale RC vehicle whilst delivering maximum power output.

Technical Performance

The EZRUN 4985 1/6th SL motor represents the cutting edge of brushless motor technology for mid-sized RC cars and trucks. With an outer diameter of just 49mm (1.92 inches) and a length of 86.5mm (3.41 inches), this is a genuinely compact motor that doesn't compromise on performance. The 5mm shaft diameter is perfectly proportioned for 1/6th scale drivetrain components, and at 587 grams, it contributes minimal unsprung weight to your vehicle. The motor's no-load current draw of just 5.4A demonstrates exceptional electrical efficiency, meaning your ESC and battery will experience less strain during operation, extending the life of both components. The precision D19×D6×T6 Japanese bearings in both the front and rear positions ensure that the rotor spins with minimal friction, contributing directly to that industry-leading 90% efficiency figure. When paired with a 3-6S LiPo battery system, this motor delivers the raw power needed for competitive 1/6th scale racing, with the flexibility to tune your power delivery by selecting different battery cell counts. The sensorless design eliminates the need for sensor wires and hall effect sensors, reducing complexity and potential points of failure whilst delivering responsive, linear throttle control that drivers expect from modern brushless RC motors. The hard anodised aluminium case with ultra-thin silicon steel laminations creates an optimal magnetic circuit, whilst the heat-resistant double-insulated windings ensure reliability even during sustained high-load operation. This is a motor engineered for serious RC enthusiasts who demand reliability, performance, and longevity from their equipment.

What's in the Box

• Hobbywing EZRUN 1/6th SL 4985-1650KV Brushless Motor (Black)

What You'll Need to Complete Your Setup

• Hobbywing EZRUN MAX6 Electronic Speed Control (ESC) — recommended for optimal performance and compatibility
• 3-6S LiPo Battery — choose 3S for lighter power delivery or 6S for maximum performance
• LiPo Battery Charger
• RC Vehicle Frame compatible with 1/6th scale motors
• Pinion Gear (sized to match your desired gearing ratio)
• M4 Mounting Screws (four screws required; maximum length 10mm recommended)

Installation and Setup Guide

• Motor Mounting — The EZRUN 4985 requires four M4 mounting screws with a maximum length of 10mm, as the mounting holes are 8mm in depth. Select screws appropriate to your specific chassis to ensure secure installation without over-tightening.
• ESC Connection — Connect the three motor wires (A, B, C) to your speed control. There is no polarity on these connections, so don't worry about initial wire orientation. If the motor spins in the wrong direction after testing, simply swap any two of the three wires to reverse rotation.
• Battery Compatibility — This motor is compatible with 3S, 4S, 5S, or 6S LiPo batteries. Ensure your ESC is rated for your chosen battery voltage before connecting power.
• Pre-Operation Check — Always recheck all installations and connections before powering on your RC vehicle for the first time. Verify that all four mounting screws are secure, all connectors are fully seated, and there are no loose wires near the rotor.

Frequently Asked Questions

• What is the difference between this motor and other EZRUN models like the 5687 or 56113? — The EZRUN 4985 1650KV is specifically engineered for 1/6th and 1/7th scale vehicles, whilst the 5687 1100KV and 56113 800KV are designed for larger 1/5th scale applications. The 4985's 1650KV rating makes it significantly faster than the lower-KV alternatives, delivering higher RPM and faster acceleration. The 4985 is more compact and lighter weight than the larger motors, making it ideal for smaller, more agile 1/6th scale platforms. Choose the 4985 if you're running a 1/6th or 1/7th scale RC car; choose the larger motors only if you're building or upgrading a 1/5th scale vehicle.
• Is this brushless RC motor suitable for beginners? — Yes, absolutely. Whilst the EZRUN 4985 is a high-performance motor, it is straightforward to install and operate. The sensorless design means fewer components to worry about, and the brushless technology requires no maintenance like brushed motors do. If you're new to RC and building or upgrading a 1/6th or 1/7th scale car, this is an excellent choice that will give you years of reliable performance without requiring constant tuning or brush replacements.
• What battery does this motor need, and what are the differences between 3S and 6S configurations? — This motor accepts 3S, 4S, 5S, or 6S LiPo batteries. A 3S battery (11.1V nominal) provides moderate power and longer runtime, making it suitable for casual bashing and learning. A 6S battery (22.2V nominal) delivers maximum performance with rapid acceleration and higher top speed, but uses battery capacity faster and generates more heat. Most competitive 1/6th scale racers run either 4S or 6S depending on track conditions and driving style. Start with 3S or 4S if you're new to the hobby, then experiment with higher voltages as you gain experience.
• Is the EZRUN 4985 motor waterproof? — The motor itself is not fully waterproof, though the hard anodised aluminium case provides excellent protection against moisture. If you plan to run in wet conditions or splash through water, ensure your ESC and battery are waterproofed, and rinse the motor with fresh water after muddy or wet use. Allow the motor to dry completely before storing.
• Can I use this motor with a different ESC, or do I have to use the EZRUN MAX6? — Whilst the EZRUN 4985 is optimised for the EZRUN MAX6 ESC, it is a standard brushless motor and can work with any quality brushless ESC rated for 3-6S LiPo batteries and appropriate current handling. However, Hobbywing's engineering team has specifically tuned the MAX6 ESC to work perfectly with this motor, so using that combination will give you the smoothest power delivery and best performance.
• What makes this motor 90% efficient, and why does that matter? — The 90% efficiency rating means that 90% of the electrical energy from your battery is converted to mechanical power spinning the rotor, with only 10% lost as heat. This is achieved through precision manufacturing, high-quality materials (ultra-thin silicon steel laminations, oxygen-free windings), and optimised magnetic circuit design. High efficiency matters because it means less heat generation (so the motor runs cooler and lasts longer), longer runtime from each battery charge, better throttle response, and less strain on your ESC and battery. It's one of the key reasons this motor is considered industry-leading.
• How many watts of power does this motor produce? — The power output depends on your battery voltage. On a 3S LiPo battery (11.1V), this motor produces approximately 1,830 watts at full throttle. On a 6S LiPo (22.2V), it produces approximately 3,660 watts. These are theoretical maximums and actual output will vary slightly depending on load, rotor speed, and other factors.
• What is sensorless operation, and is it better than sensored motors? — Sensorless brushless motors detect rotor position indirectly by monitoring back-EMF (electrical feedback from the spinning rotor) rather than using physical sensor components. For 1/6th scale RC cars, sensorless operation is perfectly fine and offers advantages including simpler construction, lower cost, and fewer potential failure points. Sensored motors are primarily used in larger scale vehicles or where ultra-smooth low-speed crawling is required. For 1/6th scale racing and bashing, the EZRUN 4985 sensorless design is ideal.
• How do I reverse the motor direction if it spins the wrong way? — Simply swap any two of the three motor wires (A, B, or C) where they connect to your ESC. For example, if you swap wires A and B, the motor will spin in the opposite direction. This is one of the advantages of brushless motors—reversing direction is quick and easy with no special tools or adjustments required.
• Is this motor suitable for rock crawling or low-speed off-road driving? — Whilst this motor is capable of smooth low-speed control, its 1650KV rating makes it optimised for higher-speed applications like racing and bashing rather than technical crawling. For rock crawling, you'd typically choose a lower-KV motor (like the 1250KV variant) that provides more torque and lower RPM. That said, paired with appropriate gearing and a quality ESC with programmable throttle curves, the 1650KV will still perform well in mixed-terrain driving.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the HOBBYWING EZRUN 1/6TH SL 4985-1650KV MOTOR (BLACK) HW30402950 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.