Evotech Performance Rectifier Guard for Honda CB1000 Hornet SP (2025)

The rectifier converts Alternating Current (AC) from the bike’s alternator into Direct Current (DC). This DC power charges the battery. It also powers all the motorcycle’s electrical systems, like the lights, fuel pump, and ECU.

The component also regulates this voltage. This keeps the power within a safe operating range. Voltage regulation is crucial to prevent overcharging, which could damage the battery and other sensitive electronics.

Since the rectifier generates heat, it must be mounted in a spot with good airflow for cooling. On the Honda CB1000 Hornet SP, the rectifier is often exposed. It is typically found under the seat area or near the front wheel. This necessary exposure leaves the unit prone to damage. It is a critical and often costly electronic component.

A direct impact from a stone or other road debris can crack the housing. It can damage the internal circuit board. Impact can also compromise the heat-dissipating fins. This leads to immediate electrical failure or a reduced lifespan. Rectifier failure may cause a dead battery or prevent the motorcycle from starting. It can even damage the entire electrical system.