Naked Motorcycles

2021Metisse Hammer MK3

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The 2021 Metisse Hammer Mk3 is a classic British-styled middleweight powered by a 649cc Triumph twin-cylinder engine producing 47 horsepower. Built around a hand-brazed chrome moly frame with period-correct Ceriani forks, it appeals to riders seeking authentic vintage styling and authentic engineering. Known for its craftsmanship and classic aesthetic, the Hammer Mk3 suits enthusiasts who prioritize character and heritage over modern performance.

Capacity: 649.0 ccm
Engine: Parallel Twin, four-stroke
Gearbox: 4-speed
Dry weight: 135.0 kg
Seat height: Not on record
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Power: 47.0 HP (34.3 kW) @ 6700 RPM

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What’s new for the 2021 Metisse Hammer MK3

vs the 2020

Spec	2020	2021
Front brakes	Expanding brake (drum brake). Triump	Expanding brake (drum brake). Triumph drum
Rear brakes	Expanding brake (drum brake). BSA	Expanding brake (drum brake). BSA drum

Other years 2016 2017 2018 2019 2020 2021

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail55%

Cornering65%

City riding45%

Daily riding35%

Touring30%

Two-up30%

Track25%

Best for: Built as a scrambler-styled classic homage, it is best suited to spirited backroad riding, café-racer style outings, and show-worthy weekend cruising rather than outright performance.
Built for: It has the raw, mechanical charm of a classic British twin, rewarding riders who enjoy engagement with the machine over outright convenience.
Not ideal for: This is not the bike for riders seeking modern comfort, long-distance touring capability, or high-speed highway performance.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Full specifications

Engine

Capacity: 649.0 ccm
Power: 47.0 HP (34.3 kW) @ 6700 RPM
Engine type: Parallel Twin, four-stroke
Power/weight ratio: 0.3481 HP/kg (dry)
Bore x stroke: 71.0 x 82.0 mm
Compression: 9.0:1
Fuel system: Carburettor
Torque: Not on record - add it

Transmission

Gearbox: 4-speed
Transmission type: Manual
Final drive: Chain

Dimensions & weight

Wheelbase: 1450 mm
Overall length: 2000 mm
Overall width: 900 mm
Overall height: 1150 mm
Dry weight: 135.0 kg
Fuel capacity: 8.00 litres
Seat height: Not on record - add it

Chassis & suspension

Frame: Brazed 4130 chrome moly tubular frame nickel plated
Front suspension: 35mm Ceriani forks with Ceriani yokes
Rear suspension: Twin Girling reproduction dampers and springs
Front wheel travel: 190 mm
Rear wheel travel: 100 mm

Brakes & wheels

Front brakes: Expanding brake (drum brake). Triumph drum
Front brakes diameter: 178 mm
Rear brakes: Expanding brake (drum brake). BSA drum
Rear brakes diameter: 178 mm
Front tyre: 2.75-21
Rear tyre: 4.50-18

Other

Color options: Battleship grey
Comments: British made bike.

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	2016	2017	2019	2020	2021
Capacity	649 cc	649 cc	649 cc	649 cc	649 cc
Dry weight	135 kg	135 kg	135 kg	135 kg	135 kg
Fuel capacity	8 L	8 L	8 L	8 L	8 L

Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.

Rider Reviews

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MotorcycleDB

The 2021 Metisse Hammer Mk3 motorcycle is a beautiful blend of classic design and modern engineering. With its sleek lines and powerful engine, this bike is sure to turn heads on the road. The attention to detail in the craftsmanship of this machine is truly remarkable, and the performance matches its striking appearance. Whether you're a seasoned rider or a newcomer to the world of motorcycles, the Metisse Hammer Mk3 offers a thrilling and satisfying riding experience.

One of the standout features of the 2021 Metisse Hammer Mk3 is its impressive handling, making it a joy to ride on both twisty mountain roads and long, straight highways. The power delivery is smooth and seamless, giving you confidence as you navigate through various riding conditions. Additionally, the bike's ergonomic design ensures a comfortable and enjoyable ride, no matter how long your journey may be. Overall, the Metisse Hammer Mk3 is a top-notch motorcycle that delivers a perfect blend of style, performance, and comfort.

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