Swapping a 35W motorcycle headlight halogen bulb with a higher wattage 55/60W bulb can have several effects, and it's important to consider the electrical capacity of your motorcycle's system.
Increased Light Output: The higher wattage bulb will generally provide a brighter light output, which can improve visibility while riding at night.
Electrical Load: The increased wattage of the new bulb will draw more power from your motorcycle's electrical system. While the motorcycle is designed to handle certain electrical loads, there is a limit to how much it can handle without causing issues.
Battery Drain: If your motorcycle's electrical system is not designed to handle the increased load of the 55/60W bulb, it may drain the battery more quickly, especially at lower engine speeds or when idling. This can lead to a discharged battery and difficulty starting the motorcycle.
Overloading the Electrical System: The increased load can strain the motorcycle's electrical system, potentially causing issues such as overheating, blown fuses, or damaged wiring.
Given that your motorcycle is a small 150cc, it may have a relatively limited electrical capacity compared to larger motorcycles. While some motorcycles might be capable of handling the increased load without major issues, it's generally recommended to stay within the manufacturer's specifications for bulb wattage.
If you still wish to use a higher wattage bulb, it would be advisable to consult your motorcycle's manufacturer or a professional mechanic to determine if the electrical system can handle the increased load. They will have the expertise to evaluate your motorcycle's specific electrical capacity and advise you accordingly.