Piaggio autolube replacement tank. This was intended for bikes with cowl latches under the seat and gas gauges but does fit P-series bikes as well. It uses the PX style gas cap and requires the gas gauge to be installed even if your bike isn't wired for it (it needs to be there to block the hole). Because no one has reproduced the p-series stock oil injected tank, this is the only option without finding a used one or refurbishing your original.
Piaggio autolube replacement tank. This was intended for bikes with cowl latches under the seat and gas gauges but does fit P-series bikes as well. It uses the PX style gas cap and requires the gas gauge to be installed even if your bike isn't wired for it (it needs to be there to block the hole). Because no one has reproduced the p-series stock oil injected tank, this is the only option without finding a used one or refurbishing your original.