It’s surprising how much power manufacturers squeeze into motorcycle engines nowadays, some even rivaling small cars. The biggest engines turn heads and deliver unmatched torque and speed. Interested in which brands build these monstrous machines? Read on.

Harley-Davidson Screamin’ Eagle 135ci

The Harley-Davidson Screamin’ Eagle 135ci crate engine produces 144 horsepower and 143 ft-lb torque at 3,500 RPM. With an 11.6:1 compression ratio, Extreme CNC-ported heads, forged pistons, and a 68mm throttle body, airflow is maximized. Developed from King of the Baggers racing, the engine bolts into 2021+ Touring models.

Triumph Rocket 3’s 2,500cc Engine

Meet the Triumph Rocket 3, a beast with a 2,500cc engine that’s pure mechanical artistry. Its unique longitudinal triple-cylinder pumps out 165 horsepower and 163 lb-ft of torque—enough to blast this heavyweight from 0 to 60 mph in under 3 seconds. That unmistakable exhaust growl and smooth shaft drive give it a unique character.

BMW R18’s 1,802cc Boxer Engine

BMW gave the R18 a unique personality through its 1,802cc boxer engine. Designed to be both powerful and eye-catching, the engine features classic elements like exposed pushrods and wide aluminum heads, paying tribute to the old-school 1936 R5. Power comes on early, which provides strong low-end torque and a rich mechanical sound.

Honda Gold Wing’s 1,833cc Flat-Six Powers

The Honda Gold Wing highlights a 1,833cc flat-six engine that’s liquid-cooled and horizontally opposed, which helps keep the bike balanced and smooth, especially at high speeds. Riders can choose the seamless Dual Clutch Transmission or enjoy precise throttle-by-wire control. An integrated walking mode also makes low-speed maneuvering surprisingly easy for a touring heavyweight.

Kawasaki Vulcan 2000’s 2,053cc V-Twin

Remember when the Kawasaki Vulcan 2000 hit the scene in 2004? It made waves as the biggest V-twin engine in production then. Equipped with forged pistons nearly as big as coffee mugs and digital fuel injection, this beast delivers 141 lb-ft of torque. The large engine size maintains smooth power during long highway cruises.

Yamaha XV1900A’s 1,854cc Engine

Yamaha’s XV1900A comes with a 1,854cc V-twin engine that produces 101 horsepower and 123 lb-ft of torque. It uses pushrod-operated valves and a power valve system to help the engine run smoothly and efficiently. This bike also features a 5-speed belt drive and a lightweight frame for easy, nimble handling.

Suzuki Boulevard M109R’s 1,783cc V-Twin 

The Suzuki Boulevard M109R features a 1,783cc liquid-cooled V-twin engine producing 128 horsepower and 118 lb-ft of torque. A 10.5:1 compression ratio, DOHC four-valve heads, forged pistons, SDTV fuel injection, and SASS dry-sump lubrication enhance performance. Plus, a 5-speed shaft drive and steel frame ensure stable handling and a smooth ride.

Indian PowerPlus 108’s 1,768cc Engine

Indian’s PowerPlus 108 is a liquid-cooled 1,768cc V-twin delivering 122 horsepower and 128 lb-ft torque at 3,800 RPM. Thanks to DOHC and four valves per cylinder, power is optimized, while a six-speed gearbox ensures smooth shifts. Additionally, a 6,500 RPM redline honors India’s 1916 military V-twin legacy.

S&S T143’s 2,343cc Crate Engine 

Are you looking to boost Harley’s power?  The S&S T143 crate packs a massive 2,343cc displacement, which delivers impressive torque and horsepower for serious street performance. Built with high-strength components and precision tuning, it offers improved throttle response and enhanced cooling for extended rides at high speeds.

Confederate X132 Hellcat’s 2,163cc Engine

The Confederate X132 Hellcat’s lightweight 2,163cc aluminum engine produces 120 horsepower and 140 lb-ft of torque for strong acceleration. Moreover, a five-speed drag racing transmission enables quick shifts, while carbon fiber wheels and Race Tech suspension work together to provide smooth handling and stability at speeds up to 172 mph.