Be nice if it was, saves you 70$ and it should easily last 20k miles at the least. Might even outlive the bike! My O-ring chain & sprockets are at 4,500 miles now and all are still like new, in function at least. Chain looks a little dirty cosmetically but it's still fine!
If it the stock chain, may as well run it until it's wasted and get yourself a whole new drive system - 14/47 sprockets if you're mainly using the TW for street riding, and a nice O-ring chain. Whole package shouldn't cost you more than 100$.