The key on the right is the largest key by weight I've ever seen for a motorcycle. It's heavy and even heavier than most automotove keys I've come across. It fits certain year Honda Gold Wing motorcycles.
The key on the left is the largest key I've ever seen for a Harley Davidson motorcycle. It's made for the Harley Davidson Street models which are now discontinued. The Street model was the cheapest and smallest motorcycle Harley has manufactured in recent years, but uses the largest key.
