It is not normal for the regulator/rectifier unit in a Yamaha FZ16 V1 or any motorcycle to get excessively heated up just a few minutes after starting the engine. While it is expected for the regulator/rectifier unit to generate some heat during operation, it should not reach a level where it becomes excessively hot to the touch.
Excessive heat from the regulator/rectifier unit could indicate a potential issue or malfunction that needs to be addressed. Here are a few possible reasons why the regulator/rectifier unit may be overheating:
Faulty Regulator/Rectifier: The regulator/rectifier unit may be defective or failing, leading to excessive heat generation. This can happen due to internal component failure or a short circuit within the unit.
Poor Electrical Connections: Loose or corroded electrical connections between the regulator/rectifier unit and the motorcycle's electrical system can cause increased resistance, leading to excessive heat generation.
High Electrical Load: If the motorcycle's electrical system is subjected to a high load due to additional accessories or modifications, it can put extra strain on the regulator/rectifier unit, causing it to overheat.
Inadequate Cooling: A lack of proper airflow or cooling around the regulator/rectifier unit can contribute to overheating. For example, if the unit is obstructed by debris or located in an area with limited ventilation, it may struggle to dissipate heat effectively.
If you notice that the regulator/rectifier unit is getting excessively hot, it is recommended to have it inspected and diagnosed by a qualified mechanic or authorized Yamaha service center. They can properly assess the situation, identify the underlying cause, and perform any necessary repairs or replacements. Ignoring an overheating regulator/rectifier unit can lead to further electrical issues and potential damage to other components of the motorcycle's electrical system.