Royal Enfield
In India, Harley Davidson found a fierce challenger in the Royal Enfield, and by all means, it came up short against the local rival. In fact, the growth of Enfield in the last 10 years suggests that the entry of Harley only helped it. Customers checked out a Harley and drooled over them but ended up buying the more affordable, lighter, and easy to maintain Enfield.
What hurts the American company more was that the Indian brand didn't sit idle instead. Without the baggage of needing to make only cruisers, Enfield brought out newer models like the Himalayan off-roader. More recently, it charted into Harley territory directly with the twin cylinder 650cc Interceptor twins. Enfield was ripe for the taking too and its massive market share meant even a small dent would have been enough for Harley to sustain itself. But it never even gave it a half decent shot. Dismissive at all times, Harley still doesn't have an answer to good old Enfield.