It is unsafe to park motorcycles in underground garages

Allow.

Fuel motorcycles are also regular motor vehicles. Placing it in the basement will not cause safety threats and hidden dangers to other vehicles. Many residential areas now have underground parking lots. And motorcycles are allowed to enter the parking lot.

The biggest safety hazard when a motorcycle enters a basement is spontaneous explosion and combustion. But the caps of motorcycle fuel tanks are all tightened. It's definitely fine if you don't encounter an open flame. The probability of this happening is extremely slim.