BAC4000 Retail
Pickup available at XION MOTORS
Usually ready in 5+ days
BAC4000 Retail
XION MOTORS
Pickup available, usually ready in 5+ days
2141 Newton Ave
San Diego CA 92113
United States
Free shipping. Ships within 1–2 days. Includes tuning.
The BAC4000 is the mid-tier ASI controller — a meaningful step up from the BAC2000 in peak output and throttle sharpness. Uses the same FOC architecture and adaptive sensorless start algorithm, tuned for higher-demand applications. Delivers up to 95% of rated motor torque without position sensors.
What this means for your ride
- Noticeably sharper throttle response versus the BAC2000
- Higher peak power output for demanding terrain and heavier loads
- Smooth, efficient FOC power delivery retained at all speeds
- Popular choice for CyberX owners who want more performance without going full BAC8000
Note: Does not include BACdoor access. If you have made changes to your bike setup, email your order number to info@xion.bike to schedule a re-tuning session. Harness sold separately — confirm compatibility before ordering.
