It is not common for motorcycle riders to put a cover specifically over their engine when it rains. However, many motorcyclists use motorcycle covers to protect their entire bike from rain, dust, and other environmental elements when it is parked for an extended period.
Motorcycle covers are designed to provide overall protection for the entire motorcycle, including the engine, frame, and other components. They are typically made of waterproof or water-resistant materials that help shield the bike from rain and prevent water from seeping into critical areas.
While motorcycle covers offer protection against rain, they are not primarily focused on covering the engine alone. Instead, they serve as a protective layer for the entire motorcycle, ensuring that the entire bike is shielded from the elements.
It's worth noting that some motorcycles come with built-in engine protection, such as engine guards or fairings, which can provide additional protection against rain or water splashes. However, these features are not typically intended to be used as covers when the motorcycle is parked.
If you're looking to protect your motorcycle's engine from rain while it is parked, using a waterproof motorcycle cover can be a good option. Just make sure to choose a cover that is specifically designed for motorcycles and provides adequate protection for the entire bike, including the engine.