well .... it depends what you mean by neglected 🤔. I do clean the chain with paraffin and lube but it's not 'every week'. That is done every 1000 miles (600 in winter), and intermediate lubing is done as required. On the Africa Twin there is a countdown Tripmeter which no-one has found a use for. You can choose a trip mileage up to 999miles, enter it, and as you ride this counts down to zero. It would be nice if it gave a nice dinging sound when it got there, but instead it just keeps on counting negatively below zero. So on my Africa Twin with gold plated DID chain, this countdown tripmeter is what I reset whenever I do a clean and lube.Clean with kerosene and lube the chain every week (you are?). Buy a DID chain (you have). Fit a Scottoiler, if you can live with the oil fling. Or all three.
Doubt that you can stop rust as you have such high qty of salt on your roads. Be interested to know what happens to your DID chain.
There appears 🤔 to be no such thing as a rustless or rust free drive chain that can be neglected.
Or, visit Fowlers Parts and buy the shaft drive conversion kit (avoid BMW Motorrad as their shaft drives seem to be built to fail), but it will ruin the look of your very pretty motorcycle.
Yeah the shaft drive doesn't sound good but the belt drive is tempting
Mike