The BAC855 replaces your bike's locked stock controller with an open, fully programmable one, so the tuning and the upgrade path belong to you rather than the manufacturer. It plugs into your existing connectors — no splicing, no soldering, no fabrication — and arrives pre-flashed with a rideable base tune.
Built for one platform
Each kit ships as a matched set cut for a single model: controller, display, vehicle-specific harness and motor cable. The version you select determines whether it fits, so confirm your exact model and generation before ordering.
Room to grow
Throttle, pedal assist and lighting are all supported, and new flash files keep arriving for different voltage and power setups — so a battery or motor change later doesn't mean starting over.