Here are a few of the classic motorcycles that represent the evolution of motorcycle technology – in America and around the world.
All of these bikes have at one time been on display in the AMA Motorcycle Hall of Fame, and some of them are part of the Hall of Fame’s permanent collection or are currently on loan.


Visit the AMA Motorcycle Hall of Fame to see what’s currently on display and read the stories of the men and women who helped make those motorcycles famous.


1941 Indian Series 441

The sun sets on the golden age of fours

Engine: Inline four-cylinder inlet over exhaust valves

Displacement: 77.21ci (1,265cc)

Transmission: Three-speed, hand-shift

Horsepower: 40 hp

Weight: 568 pounds

Top Speed: 95 mph

All good things, it is said, must come to an end.

And when it came to the luxury-class four-cylinder motorcycles that grew up during American motorcycling’s heyday in the first decades of the 20th Century, the end came in 1941.

That was the final full year of production for the last of the classic American-made, four-cylinder motorcycles: The Indian Series 441 Four.

With its gracefully skirted fenders, smooth ride and prestige image, the 441 was the height of development of the American four. But it didn’t begin that way.

In fact, Indian’s four didn’t even start out as an Indian. Its origins date from the 1920s, when Will and Tom Henderson, who built the Henderson Four starting in 1911 and then sold that company, created their second four-cylinder machine, the Ace, which instantly took its place among America’s most respected machines.

But then Will Henderson died in a testing accident, and the company foundered. When the Ace name and assets went up for sale in 1927, Indian emerged the winning bidder. Indian debuted its first four less than three months later, even leaving the Ace name on the tank in the early years. In time, Indian made the machine its own, first temporarily inverting the valve-train, then redesigning the engine in ’38. The skirted fenders arrived in ’40.

By then, the Indian Four was a truly luxurious machine, with an easy-to-start 77-cubic-inch (1,265cc) engine; a three-speed, tank-shift transmission, a sealed-beam headlight, as well as optional 5.00x16 tires.

Civilian models were produced through 1941. But with the U.S. becoming involved in World War II, only police production continued. Then, it disappeared, making the 441 the last of the breed.

This ’41 Indian Four was raffled off, with proceeds supporting the Motorcycle Hall of Fame Museum at AMA headquarters in Pickerington, Ohio.