MGCycle sells an oil filter access cover tool with a 1/2" drive - could come in handy used in conjunction with a breaker bar . . .
https://www.mgcycle.com/index.php?main_page=product_info&products_id=2695:dbbf603ff0e99629dda5d75b6f75f966
@fastaussie There are a couple of them for sale in the Bay Area . . .
https://sfbay.craigslist.org/eby/mcy/d/fremont-moto-guzzi-v11-le-mans/7762291334.html
https://sfbay.craigslist.org/eby/mcy/d/oakland-2002-moto-guzzi-v11-lemans/7759411232.html
These are 24volts relays - diode protected . . . .
The ones to get for our V11s from Picker Components >> PC782-1C-12S-R-X
https://www.digikey.com/en/products/detail/picker-components/pc782-1c-12s-r-x/12352866