Powertrain Assembly

Overview

The powertrain assembly converts electrical energy into motion, consisting of the motor, transmission system, and throttle control. This assembly is responsible for propelling the kart forward and providing speed control.

Assembly Components

Primary Components

• Motor: Kunray MY1020 BLDC motor (72V, 3000W)
• Transmission: 219 pitch chain and sprocket system
• Throttle Pedal: Hall effect sensor for speed control
• Fasteners: All mounting hardware and bolts

System Integration

• Motor provides power through custom 10mm shaft
• Transmission transfers power to rear axle via 219 chain system
• Throttle pedal provides analog speed control signal
• All components mounted securely with documented fastener specifications

Assembly Sequence

1. Mount motor to chassis using motor mount fasteners
2. Install custom front sprocket on motor shaft
3. Mount rear sprocket to axle
4. Install and tension 219 chain
5. Mount and wire throttle pedal
6. Test system operation and adjust chain tension

Key Specifications

• Power: 3000W maximum
• Operating Voltage: 72V (motor), 5V (throttle)
• Transmission Ratio: Variable (depending on sprocket selection)
• Chain Pitch: 219 (7.774mm)

Maintenance

• Regular chain tension checking and adjustment
• Sprocket wear inspection
• Throttle pedal calibration verification
• Motor controller connection inspection

See individual component pages for detailed specifications and BOM information.