The Triumph Speed Four is a distinctive middleweight naked sportbike that blends aggressive styling with a performance-oriented riding experience. Launched in 2002 and based on the Triumph TT600, the Speed Four was a streetfighter-style machine designed for riders who sought an agile, high-revving, and responsive motorcycle. In this guide, we will explore the Speed Four’s specifications, features, and performance, offering insights into why this bike remains a unique option in the world of naked motorcycles.
Specifications
Engine and Performance
Engine Type: 599cc, liquid-cooled, inline-four
Power Output: Approximately 98 hp @ 11,750 rpm
Torque: 61 Nm @ 10,000 rpm
Fuel System: Multipoint sequential electronic fuel injection
Compression Ratio: 12.5:1
Transmission: 6-speed manual
Top Speed: Around 140 mph (225 km/h)
Chassis and Dimensions
Frame: Aluminum twin-spar frame
Front Suspension: 43mm Kayaba telescopic forks (fully adjustable)
Rear Suspension: Monoshock with adjustable preload and rebound damping
Front Brake: Dual 310mm floating discs with four-piston calipers
Rear Brake: Single 220mm disc with single-piston caliper
Wheelbase: 1,390mm
Seat Height: 810mm
Dry Weight: 168 kg
Features
Design and Styling
The Triumph Speed Four carries a minimalist yet aggressive look. It features the distinctive twin round headlights, a hallmark of Triumph’s naked bike series, giving it a streetfighter attitude. The bike lacks a full fairing, which not only reduces weight but also enhances its raw and mechanical aesthetic.
Ergonomics and Comfort
The upright riding position, slightly rear-set footpegs, and relatively narrow seat make the Speed Four comfortable for both commuting and spirited rides. The clip-on handlebars are positioned lower than those of standard naked bikes, providing a slightly aggressive stance without sacrificing long-distance comfort.
Instrumentation and Electronics
The Speed Four features a simple yet effective instrument cluster with an analog tachometer and digital speedometer. Essential warning lights and trip meters are included, but the bike lacks advanced electronics like traction control or ride modes, keeping the riding experience pure and mechanical.
Exhaust and Sound
One of the standout features of the Speed Four is its exhaust note. The inline-four engine produces a distinct, high-pitched wail, especially in the higher rev range, making it a favorite among riders who enjoy an engaging and thrilling soundtrack.
Performance and Handling
Engine Characteristics
The 599cc engine is rev-happy, with most of its power available at the top end. Unlike some torque-heavy naked bikes, the Speed Four requires riders to keep the revs up to extract its full potential. This makes it an exciting choice for those who enjoy aggressive riding and frequent gear changes.
Handling and Suspension
Thanks to its lightweight aluminum frame and fully adjustable suspension, the Speed Four offers exceptional handling. The bike feels stable in corners, providing confidence to riders who enjoy twisty roads and aggressive riding. The suspension setup allows fine-tuning for different riding conditions, whether on smooth asphalt or bumpy roads.
Braking Performance
Equipped with dual 310mm front discs and four-piston calipers, the braking system on the Speed Four is strong and responsive. The rear brake complements the setup, helping maintain control in emergency braking situations.
Pros and Cons
Pros:
Lightweight and agile handling
High-revving, powerful inline-four engine
Fully adjustable suspension for a customizable ride
Strong braking system
Unique styling with twin headlights
Cons:
Lack of low-end torque compared to twin-cylinder competitors
Basic electronics with no modern rider aids
Can feel underpowered at lower RPMs
Some riders find the seat uncomfortable for long rides
Who Should Buy the Triumph Speed Four?
The Triumph Speed Four is ideal for riders who prefer an engaging, high-revving sportbike with streetfighter aesthetics. It suits experienced riders looking for a nimble and responsive bike without the electronic aids found in modern motorcycles. While it may not be the best option for beginners due to its power delivery and sporty ergonomics, those who enjoy fine-tuning their ride will appreciate its adjustable suspension and sharp handling.
Conclusion
The Triumph Speed Four remains a unique and charismatic motorcycle in the naked bike segment. While it may not have achieved widespread popularity like some of its competitors, it offers a rewarding and exciting ride for those who appreciate a pure, high-revving sportbike. With its agile handling, distinctive styling, and strong braking performance, the Speed Four is an underrated gem that continues to have a dedicated following. If you are looking for a motorcycle that combines classic Triumph engineering with an aggressive streetfighter attitude, the Speed Four is well worth considering.
