New 20 ounce tumblers available now! Forum donation credit with purchase. https://www.wildguzzi.com/Products/products.htm#Tumbler
I don't recall having any problems but I've got a variety including some pretty low profile metric 6-pt Snap-Ons which are usually my go to anyway.
The AF1 Racing website 2016 V7 II Stone ABS exploded view shows the washer - "23 GU12154200 Gasket 8,25x15x1" - look at Crankcase - keylist #23https://www.af1racing.com/store/Scripts/prodList.asp?idCategory=2914&description=2016+V7+Stone+II+OEM+Parts+Catalogsame on the 2016 V7 II Special ABShttps://www.af1racing.com/store/Scripts/prodList.asp?idCategory=2929&description=2016+V7+Special+II+OEM+Parts+Catalogand same on Stornellohttps://www.af1racing.com/store/Scripts/prodList.asp?idCategory=2997&description=2016+V7+II+Stornello+OEM+Parts+CatalogAnd for giggles I checked my V7III Dark - https://www.af1racing.com/store/Scripts/prodList.asp?idCategory=3202&description=V7+III+Carbon+Dark+OEM+Parts+CatalogIt's under Lubrication but it's there:2 GU12154200 Gasket 8,25x15x1 1< shrugs >
I don't know if any local Guzzi shops that remap.That said, what changes have been made?And how about working with Beetle to remap it yourself?