RPX 4 (RPX4) BLACK Brushless Electronic Speed Control ESC [Yokomo] BL-RPX4

Take your racing setup to new territory with the BL-RPX4, Yokomo’s next-generation speed controller tailored for uncompromising performance. Developed through relentless on-track testing, this unit builds on the legacy of its RPX predecessors while pushing boundaries in power delivery and motor control—right out of the box.

Key Features

• Developed using advanced power MOS FETs for increased output and responsiveness

• Effortlessly manages high-speed modified motors while maximizing stock motor efficiency

• Programmed with optimized data from RPX2 for smooth category-specific tuning

• BEC output selectable between 6V and 7V, up to 8A

• Compatible with BL-R26P programmer (firmware update required for RPX4 support)

• Compact dimensions and lightweight build for efficient mounting and heat dispersion

• High-efficiency cooling fan included

Why Choose This?

• Fine-tuned through racing to deliver reliable performance in real conditions

• Easy to configure thanks to preloaded category-specific program data

• Smooth handling across different motor types—from stock to heavily modified

• Advanced current control ensures minimal heat and more consistent throttle feel

• Built for serious competition yet intuitive for seasoned club racers

Product Information

• Motor Type: 540-size Sensored Brushless

• Motor Limit: 4.5T and above

• Operating Voltage: 6V–9V

• Rated Current: 160A (per phase)

• BEC Output: 6V/7V at 8A

• Size: 31 x 35 x 17.6 mm

• Weight: 39.6g (including BEC cable)

• Cooling Fan: 30 x 30 x 10 mm

• Power Cables: 12AWG

• Programmer Compatibility: BL-R26P Series (firmware update required)

The BL-RPX4 isn’t just an update—it’s a leap forward in brushless control. Whether you’re fine-tuning lap times or chasing podiums, this ESC offers the power and control you’ve been waiting for. Responsive, stable, and built for the future of RC racing.