No it won't. Sadly at this point in time the number of Multistrada aftermarket fuel caps is very poor. Even Ducati don't do one ! Andy
Andy, SSR do one for about £40 Slingshot Racing : Ducati Multistrada 1200 CNC Billet Keyless Gas Fuel Cap Lid - $49.99 I can vouch for the quality, have an SSR cap on my 748 for the last 8 years. Black anodising has faded to a tasteful dull gold colour however