3650 3900KV Brushless Motor 1/10 RC Car 3.175mm Shaft 540 Motor High Speed Waterproof Motor for Most of 1:10 Scale RC Vehicles Truck Update PartsFeatures:

✔Specially designed for 1/10 rc racing car, waterproof, suitable for various condition races,a good choice for your rc racing car.
✔High torque high efficiency,much faster acceleration response and very stable output of power to the drivetrain.
✔waterproof function let your car challenge the muddy road, fearless!

Notice:
1.Due to the high KV value of this motor, please use above 80A ESC.
2.The motor fits 2-3s battery (2s bettery is recommended for ESCs below 100A),
please do not use 2 batteries together, especially 3S batteries!
3.To avoid potential risks such as ESC/motor damage or malfunction caused by overheat,
start with a very small pinion first and check the ESC & motor temperatures regularly throughout the run.
4.A wrong tooth ratio can cause the motor to overheat. The motor temperature should be lower than 212℉ during the operation.
Temperatures above 212℉ will weaken the magnet and may partly melt the coils and eventually damage the ESC (because of strong current)!
Specifications:

Model: 3650
Watts: 900W
Max voltage: ＜13V
Max Amps: 69A
KV(RPM/Volt): 3900KV
Max RPM: 50000
Shaft length: 15mm
Shaft diameter: 3.175mm
Diameter: 36mm
Length: 50mm
Plug type: 4mm golden banana plug

Package Including：
1 X 3650 3900KV Motor
1 X Product Manual