--- product_id: 43842585 title: "GoolRC Brushless Motor 3900KV" brand: "goolrc" price: "€ 92.32" currency: EUR in_stock: true reviews_count: 9 category: "Gool Rc" url: https://www.desertcart.hr/products/43842585-goolrc-brushless-motor-3900kv store_origin: HR region: Croatia --- # 3900KV high RPM brushless motor Waterproof & dust-proof for all-weather racing Multiple protections: low voltage, overheat, signal loss GoolRC Brushless Motor 3900KV **Brand:** goolrc **Price:** € 92.32 **Availability:** ✅ In Stock ## Summary > ⚡ Dominate Every Track, Rain or Shine – Upgrade Your RC Game Now! ## Quick Answers - **What is this?** GoolRC Brushless Motor 3900KV by goolrc - **How much does it cost?** € 92.32 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/43842585-goolrc-brushless-motor-3900kv) ## Best For - goolrc enthusiasts ## Why This Product - Trusted goolrc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Dual ball bearings and precision balanced rotor ensure smooth, reliable performance lap after lap. - • **Smart Safety Tech:** Integrated low voltage cut-off, overheat, and throttle signal loss protections keep your electronics safe and sound. - • **All-Weather Warrior:** Fully waterproof and dust-proof design means your 1/10 scale RC car dominates rain or shine without a hiccup. - • **Race-Ready Powerhouse:** 3900KV brushless motor delivers blistering speeds up to 50,000 RPM for unmatched RC thrills. - • **Plug & Play Flexibility:** Direct-solder wiring tabs and 60A ESC combo with programmable settings let you fine-tune your ride like a pro. ## Overview The GoolRC Upgrade Waterproof 3650 3900KV Brushless Motor with 60A ESC Combo is engineered for 1/10 scale RC cars and trucks, delivering up to 900W of power and speeds reaching 50,000 RPM. Featuring a waterproof and dust-proof design, dual ball bearings, and multiple safety protections, this combo ensures high torque, long run times, and reliable performance in all conditions. Its programmable ESC and flexible wiring options make it a versatile upgrade for serious RC enthusiasts seeking speed and durability. ## Description The original upgrade waterproof 3650 3900KV brushless motor with 60A ESC combo is designed to provide both quality and performance at an affordable price. Waterproof function motor and ESC let your car challenge the muddy road. Providing much convenience for your 1/10 RC car truck. PS?Click the link to watch the product video: https://www.youtube.com/embed/PZ3c92A6isM Features: 4 pole 12 slot high-torque motor design. 3.175mm shaft diameter. High purity copper windings maximizes efficiency. Precision engineered for maximum energy conversion. Precision balanced rotor,smoothness for best reliability and maximum RPM. Mutiple protection features: Low voltage cut-off protection, over-heat protection, throttle signal loss protection. Bulit-in 5.5V/3A BEC. Suit for 1/10 scale RC car. Motor Specifications: Brand name: GoolRC Watts: 900W Max voltage: <13V Max Amps: 69A KV(RPM/Volt): 3900KV Max RPM: 50000 Diameter: 36mm Length: 50mm Shaft length: 15mm Shaft diameter: 3.175mm Plug type: 4mm golden banana plug ESC Specifications: Brand name: GoolRC Item name: waterproof ESC Continue current: 60A Burst current: 320A Battery: 2-3S Li-Po / 4-9S Ni-Mh Ni-Cd BEC output: 5.5V / 3A Power supply plugs: T plug male Motor plugs: 4mm banana plug female Dimension: 50 * 35 * 34mm / 2.0 * 1.4 * 1.3in (without cables) Package Information: Package size: 10.5 * 8 * 6cm / 4.1 * 3.2 * 2.4in Package weight: 293g / 10.3oz Gift box package Package List: 1 * GoolRC 3650 3900KV Motor 1 * GoolRC Waterproof 60A Brushless ESC Review: Wooh! Now that's fast! Requires patience. - You must spend some time configuring the right way. Here's some advice. 1) I used a FS-GT3C controller/receiver to connect to the ESC. This made it much easier to fine tune. 2) Mine went WAY faster in reverse! Despite buying the motor/esc combo and matching the red, blue, yellow wires. My car was twice as fast in reverse. To fix, I swapped the blue and yellow motor wires and instantly my RC car is insanely fast going forward. 3) The ESC can be programmed via an extra programming card. That will help you set the min/max strength of forward, reverse, braking strength and more, including some settings you may not be thinking of. 4) If you are coming from a brushed motor to this brushless motor/esc, be sure to give it a gentle break-in. I used more than half a battery before I really started pushing it to max speed. 5) I built a Tamiya Hot Shot 2 and a Tamiya Dark Impact and managed to cram 2 of these motors in. While I was successful at fitting the motor in both cars, the Dark Impact required that I grind down the tip of the motors drive rod. They give you a generous size on the motor, but the Dark Impact has space limitations. I own 5, 1/10th scale RC cars/trucks. 2 are brushed, 3 are brushless. Bang for the buck, excellent price, faster top speed than expected. Cons: The esc is just a little big. Not by much. But, let's just say I really worked to fit it into the Hot Shot 2. Was an easy fit on the Dark Impact. Fitting the motor on the Dark Impact took some thought. It'll only fit 1 way! 3s Lipo promoted on listing, paperwork in box says 2s only. I only run 2s, but I've noticed others say 3s works. While the numbers say it is possible. I believe the manufacturer is trying to keep us within safe limits. Best to stick with 2s and if attempting 3s, monitor very closely for heat build up. Pros: No motor heat buildup on the 2 I am currently running. Motors seems to stay way cooler than brushed motors. Love the torque and top speed (keeping stock gearing). 4wd cars seem to love it. A really nice upgrade for anyone coming from brushed to brushless. There's more room for tweaking. I like how many adjustments I can make. I also really liked the price. I'm actively racing my two cars, and if I run into troubles, I will be sure to update my review. Review: NOT WORTH IT!! - Under powered an esc burnt up shortly after running was wired correctly if u want brushless spend the extra $ an get a good set up ## Features - Precision balanced rotor, smoothness for best reliability and maximum RPM NOTE: The product recommends using 2S (7.4V) batteries for the unit. Using a mismatched battery may result in the risk of burning out the electronics. - High strength magnets for unmatched brush-motor performance Excellent torque and long-run times - Direct-solder wiring tabs for flexible soldering options - Dual-ball bearings design.Water-proof and dust-proof for all weather races - Multiple protections: Low voltage cut-off protection for battery / Over-heat protection / Throttle signal loss protection ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0719B6F9N | | Best Sellers Rank | #208,754 in Toys & Games ( See Top 100 in Toys & Games ) #389 in RC Electric Motors | | Brand Name | GoolRC | | Customer Reviews | 3.4 3.4 out of 5 stars (258) | | Horsepower | 900 Watts | | Item Dimensions W x H | 2.56"W x 1.42"H | | Manufacturer | GoolRC | | Material Type | Copper | | Model | JSZ7341174698031AL | | Shaft Diameter | 3.18 Millimeters | | Speed | 50000 RPM | | UPC | 602430460593 | | Voltage | 13 Volts, 5.5 Volts | ## Product Details - **Brand:** GoolRC - **Horsepower:** 900 Watts - **Product Dimensions:** 2.56"W x 1.42"H - **Speed:** 50000 RPM - **Voltage:** 13 Volts, 5.5 Volts ## Images ![GoolRC Brushless Motor 3900KV - Image 1](https://m.media-amazon.com/images/I/519YEEdEq-L.jpg) ## Questions & Answers **Q: Will this work with Bezgar hm162?** A: If you can modify the truck to adapt the motor mounting, and mount for the ESC, it should work fine. You have to use both the motor and ESC since the original truck motor is brushed, and the new one is brushless. **Q: Will this fit a typhon 3s blx v4?** A: Sure. **Q: how fast will it make a stampede 2 wd go** A: 25-30 mph **Q: Is this worh buying** A: I've only had this a short time but it is working fine.. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Wooh! Now that's fast! Requires patience. *by A***R on June 12, 2024* You must spend some time configuring the right way. Here's some advice. 1) I used a FS-GT3C controller/receiver to connect to the ESC. This made it much easier to fine tune. 2) Mine went WAY faster in reverse! Despite buying the motor/esc combo and matching the red, blue, yellow wires. My car was twice as fast in reverse. To fix, I swapped the blue and yellow motor wires and instantly my RC car is insanely fast going forward. 3) The ESC can be programmed via an extra programming card. That will help you set the min/max strength of forward, reverse, braking strength and more, including some settings you may not be thinking of. 4) If you are coming from a brushed motor to this brushless motor/esc, be sure to give it a gentle break-in. I used more than half a battery before I really started pushing it to max speed. 5) I built a Tamiya Hot Shot 2 and a Tamiya Dark Impact and managed to cram 2 of these motors in. While I was successful at fitting the motor in both cars, the Dark Impact required that I grind down the tip of the motors drive rod. They give you a generous size on the motor, but the Dark Impact has space limitations. I own 5, 1/10th scale RC cars/trucks. 2 are brushed, 3 are brushless. Bang for the buck, excellent price, faster top speed than expected. Cons: The esc is just a little big. Not by much. But, let's just say I really worked to fit it into the Hot Shot 2. Was an easy fit on the Dark Impact. Fitting the motor on the Dark Impact took some thought. It'll only fit 1 way! 3s Lipo promoted on listing, paperwork in box says 2s only. I only run 2s, but I've noticed others say 3s works. While the numbers say it is possible. I believe the manufacturer is trying to keep us within safe limits. Best to stick with 2s and if attempting 3s, monitor very closely for heat build up. Pros: No motor heat buildup on the 2 I am currently running. Motors seems to stay way cooler than brushed motors. Love the torque and top speed (keeping stock gearing). 4wd cars seem to love it. A really nice upgrade for anyone coming from brushed to brushless. There's more room for tweaking. I like how many adjustments I can make. I also really liked the price. I'm actively racing my two cars, and if I run into troubles, I will be sure to update my review. ### ⭐ NOT WORTH IT!! *by R***Y on January 15, 2026* Under powered an esc burnt up shortly after running was wired correctly if u want brushless spend the extra $ an get a good set up ### ⭐⭐⭐⭐⭐ cheap price *by M***S on August 6, 2024* works, but setup is hard ... ## Frequently Bought Together - GoolRC Upgrade Waterproof 3650 3900KV Brushless Motor with 60A ESC Combo Set for 1/10 RC Car Truck - Zeee 7.4V Lipo Battery 2S 50C 5200mAh Lipos Hard Case with Dean-Style T Connector for RC Car Trucks 1/8 1/10 RC Vehicles(2 Packs) - SUPULSE LiPo Battery Charger 2S-3S RC Balance Charger AC 7.4-11.1V 10W Upgrade Version Compact Lipo Charger RC Car Charger for XHR Plug Battery(B3V2) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/43842585-goolrc-brushless-motor-3900kv](https://www.desertcart.hr/products/43842585-goolrc-brushless-motor-3900kv) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-14*