When I went to my Tiger, I was a little concerned on the additional maintenance with the chain, as the last number of bikes I have owned were shafts. With the current modern chains, like what
@Dirt_Dad has said, it really isn't much of a concern. I currently have 33K miles on my Tiger with the original chain. Everything is within spec, although with needing new tires and a valve check coming up, I will be putting on a new chain (and sprockets) because of the mileage on it.
The only additional maintenance I do, is about every 1,000 - 1,500 miles I clean the chain, and after every ride I put the bike on the center stand and spray the chain with some lube. Chain has only needed to be adjusted three times.