Read the full answer... When you park for short periods, i.e. pay on hourly basis with APCOA FLOW, EasyPark or in the payment machine: The rules written on the signage is valid for all vehicles, including motorcycles, which means that you must be aware of the signage and follow the rules on these.
When you have a parking subscription: You can only use your parking subscription for a motorcycle, if you have a digital subscription solution with a valid permit that associates your motorcycle’s registration number with the permit. If you only have a permit with a physical card for the windshield, you unfortunately cannot use this when park your motorcycle. Instead you must pay for your parking via a payment machine or payment app.