Introduction: Kunray’s MY1020 motor links configurable voltage, usable torque, and retrofit flexibility for riders building dependable electric mobility projects at manageable cost.
Electric motor conversions rarely fail because a buyer cannot find a wattage number. They fail when voltage, controller current, gearing, cooling, and mounting geometry are treated as separate decisions. Kunray’s MY1020 brushless motor family is presented for that exact retrofit environment, with configurations from 36V 1000W through 72V 3000W, plus bracket and heat-sink choices.
In this edited conversation, Maya Chen, Product Manager at Kunray, discusses why configurable hardware still matters, how riders should read motor specifications, and where the real cost of a DIY conversion appears. The interview is based on the product information published for the MY1020 and Kunray’s company profile; the speaker name is an editorialized interview identity.
Q&A Body
The MY1020 spans 36V to 72V and 1000W to 3000W. What problem were you trying to solve with that range?
Maya Chen, Product Manager: The starting point was the reality of retrofit work. A scooter owner, a go-kart builder, and an e-bike hobbyist may all need a motor, but their battery voltage, controller, frame space, and expected load are different. A single fixed output forces people to redesign around the motor or buy more capacity than they can use. The MY1020 family gives them a choice of operating window while keeping a familiar motor format. That does not remove the engineering work; it makes the first decision more manageable.
The page lists a 95 mm diameter and several speed and torque figures. How should a buyer translate those numbers into a real project decision?
Maya Chen, Product Manager: Numbers only become useful when they are connected to a physical installation. The 95 mm diameter helps a builder check frame clearance, mounting plates, chain alignment, and heat-sink space before ordering. Rated speed and torque then help estimate whether the setup is better suited to acceleration, climbing, or a higher-speed light vehicle. We encourage customers to check the complete system: battery voltage, controller current, wheel or sprocket ratio, rider and vehicle weight, and cooling conditions. A motor is not an isolated performance promise.
Why retain a brushed-looking, chain-driven MY1020 format while the market talks about integrated systems?
Maya Chen, Product Manager: Retrofit customers often value access and serviceability over a fully integrated package. The MY1020 format can fit projects that already use a chain, T8F 11T sprocket, or mid-drive layout. It also lets a builder replace a failed motor without discarding the rest of the vehicle. Integrated systems can be elegant, but they may require proprietary frames, displays, or communication protocols. Our approach is to support the person who wants to modify an existing platform, test a new vehicle concept, or keep a small fleet maintainable.
The product offers a motor with or without a bracket and a standard or heat-sink option. Where do those choices create the most practical value?
Maya Chen, Product Manager: Those options acknowledge that no two retrofit frames are identical. A bracket can shorten the fabrication stage for a straightforward installation, while a builder with a custom chassis may prefer to make the mount around existing geometry. The heat-sink choice matters when the motor will work hard for longer periods, especially under higher load or in a compact enclosure. We do not treat the upgraded option as automatically necessary. The right question is how much heat the duty cycle creates and how much airflow the vehicle allows.
What is the most common mistake customers make when they see a 3000W rating?
Maya Chen, Product Manager: They sometimes read the headline wattage as a complete vehicle specification. A 72V, 3000W configuration still needs a compatible controller, battery capable of delivering the required current, suitable wiring, mechanical alignment, and a frame and brake system that can handle the resulting speed and mass. The published 3000W version is listed at 4900 RPM with about 5.4 N·m of torque, but acceleration at the wheel depends on gearing and load. We want customers to plan the system as a whole.
How do you balance a low purchase price with the hidden costs of a failed retrofit?
Maya Chen, Product Manager: Price matters most when it is considered alongside rework. A motor that is inexpensive but difficult to mount, poorly matched to a controller, or difficult to cool can create costs later through fabrication time and repeated shipping. Our product range is intended to reduce that uncertainty through selectable voltage and power, clear basic dimensions, and options such as a bracket or heat sink. We also keep support available for specification questions. The goal is not to promise that every installation will be simple.
The page mentions pure copper coils and faster cooling. What does that mean in day-to-day use?
Maya Chen, Product Manager: For a buyer, those statements should translate into operating discipline rather than marketing shorthand. Copper windings are relevant to electrical efficiency and heat management, while cooling depends on the heat path, airflow, load, and run time. A rider climbing repeatedly with a heavy load creates a different thermal condition from a light scooter making short trips. We therefore describe the material and cooling intent, but we still expect the builder to provide suitable ventilation and to avoid treating a rating as permission for continuous overload.
What support does a DIY customer actually need after receiving the motor?
Maya Chen, Product Manager: The first need is usually specification clarity: confirming voltage, rated power, mounting choice, sprocket, and controller compatibility. The next is installation discipline, including alignment, fastener security, cable routing, and a controlled first test. Kunray maintains product manuals and support channels, and the company profile describes independent R&D, production, OEM work, and after-sales service. That combination matters because DIY users often arrive with a very specific frame or conversion goal. Support should help them identify the information still missing, not simply push a larger motor.
Where does the MY1020 fit among the projects you expect to see next?
Maya Chen, Product Manager: We see a wide range: electric scooters that need a replacement drive, e-bike conversion experiments, small go-karts, mini electric motorcycles, and custom mid-drive systems. The common thread is a builder who wants more control over the vehicle than a sealed consumer product allows. That audience also accepts responsibility for integration, which is why the product page presents multiple configurations rather than one universal kit.
If you had to reduce the product philosophy to one lesson for a first-time builder, what would it be?
Maya Chen, Product Manager: Start with the use case, not the biggest number. Define the vehicle weight, terrain, expected speed, run time, battery voltage, and available mounting space. Then choose the smallest MY1020 configuration that gives appropriate margin and plan the controller, gearing, cooling, and braking around it. That process is more repeatable than buying a high-output motor and trying to solve compatibility afterward. Our broader philosophy is that freedom in electric mobility comes from understandable choices.
As the conversation went on, one design logic kept returning: configuration is useful only when it makes the entire retrofit easier to reason about. For the MY1020, that means treating voltage, mechanical fit, cooling, and duty cycle as one decision.
The MY1020 discussion positions electric motor conversion as a practical systems exercise rather than a hunt for the largest rating. Kunray’s product page gives builders a broad but legible set of choices: 36V, 48V, 60V, or 72V; outputs from 1000W to 3000W; a consistent 95 mm motor diameter; T8F 11T sprocket compatibility; and optional mounting and heat-dissipation hardware. Those details do not replace a controller calculation or a brake check, but they give a builder a clearer starting point.
That is also the commercial lesson behind the interview. In a fragmented retrofit market, value is created when a buyer can make a compatible choice early, avoid unnecessary fabrication, and keep the vehicle serviceable later. A motor supplier earns trust less through a single headline specification than through the clarity of the surrounding decisions.
