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2024 Triumph Speed 400 Overview
Triumph Speed 400 is a naked bike motorcycle, displacing 398 cc. Power comes from a Four stroke, DOHC, single cylinder, 4 valves engine, a compression ratio of 12.1:1. On the performance side, it delivers 29.4 kW @ 8000 rpm of peak power and 38 Nm @ 6500 rpm of torque. On the road, the 2024 Speed 400 tips the scales at 170 kg, carries a 13-litre fuel tank, offers a seat height of 790 mm and spans a 1377 mm wheelbase. That's roughly 38.5 kg lighter than the average naked bike motorcycle in our database. The full 2024 Triumph Speed 400 spec sheet below covers every technical detail, from suspension travel to tyre sizes.
2024 Speed 400 - Pros & Cons
Strengths
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Strong power output: With 29.4 kW @ 8000 rpm and 38 Nm @ 6500 rpm of torque on tap, the Speed 400 is no slouch for its class.
Considerations
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Chain final drive upkeep: Budget time for routine chain maintenance - it's cheap to replace but needs consistent attention to avoid premature sprocket wear.
Wear Points & Servicing Notes
Cooling system servicing
Speed 400's Liquid cooled setup is low-maintenance provided the coolant interval is kept - old, acidic coolant is the main cause of long-term corrosion in the water passages.
Brake disc and pad wear
Braking up front comes from Single 300 mm disc with radially mounted 4-piston caliper - solid stopping power, with disc and pad wear best checked on the same schedule as tyre changes.
Suspension condition on used examples
The Speed 400's suspension runs 43mm Showa Big Piston, non-adjustable inverted fork at the front. The rear uses Single shock, fixed damping with the shock adjustable piggy-back reservior. Fork-seal condition and rear linkage play are the two things worth checking before buying used.
Final drive maintenance
The Speed 400 uses chain final drive, which is cheap to replace but needs regular cleaning, lubrication and tension checks to get a full service life out of the sprockets.
Frame & chassis check
Built around a Hybrid spine/perimeter, tubular steel, bolt-on rear subframe, the Speed 400's chassis is straightforward to inspect: look for corrosion, cracks or repair welds around stress points like the head-stock and swingarm mounts.
Speed 400 - Buying & Maintenance Guide
What to check before buying
Before handing over money for a used 2024 Triumph Speed 400, cover the fundamentals: service book and oil change history, chain and sprocket wear, and any sign of oil weeping around the casings. Cold-starting it yourself tells you a lot - a healthy Speed 400 should catch quickly and settle into a smooth idle.
Oil and filter changes
Nothing protects a Speed 400's engine like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). Match the viscosity grade to what the owner's manual specifies, not what's cheapest.
Carburetor upkeep
Deposits in the carbs are the usual culprit behind poor running on a stored Speed 400 - strip and clean the float bowls before the first start. Pilot jets clog first and get overlooked most, so make a point of checking them.
2024 Triumph Speed 400 - Frequently Asked Questions
What engine does the 2024 Triumph Speed 400 have?
The 2024 Triumph Speed 400 uses a Four stroke, DOHC, single cylinder, 4 valves engine with 398 cc of displacement. It is liquid cooled.
How much does the 2024 Triumph Speed 400 weigh?
The 2024 Triumph Speed 400 weighs 170 kg. This is the manufacturer's wet figure.
How much power does the 2024 Triumph Speed 400 make?
The 2024 Triumph Speed 400 produces 29.4 kW @ 8000 rpm of power and 38 Nm @ 6500 rpm of torque. These are peak figures.
What is the fuel tank capacity of the 2024 Triumph Speed 400?
The 2024 Triumph Speed 400 has a 13-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 216-260 km between stops.
Is the 2024 Triumph Speed 400 suitable for shorter riders?
The 2024 Triumph Speed 400 has a seat height of 790 mm. This is a moderate seat height that suits a wide range of rider heights.
What brakes does the 2024 Triumph Speed 400 have?
The 2024 Triumph Speed 400 uses Single 300 mm disc with radially mounted 4-piston caliper at the front and Single 230 mm disc with floating caliper at the rear.
What tyre sizes does the 2024 Triumph Speed 400 use?
The 2024 Triumph Speed 400 runs 110/70 x R17 front and 150/60 x R17 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2024 Triumph Speed 400 have?
The 2024 Triumph Speed 400 is fitted with a 6-Speed transmission.
Key Specifications
Engine
Four stroke, DOHC, single cylinder, 4 valves
Power
29.4 kW / 40hp @ 8000 rpm
Torque
38 Nm / 28 ft-lbs @ 6500 rpm
Top Speed
Not published by manufacturer
Fuel Capacity
13 Litres / 3.43 US gal
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Full 2024 Triumph Speed 400 Specifications
Year
2024
Make Model
Triumph Speed 400
Seat Height
790 mm / 31.1 in
Wheelbase
1377 mm / 54.2 in
Height
1075 mm / 42.3 in
Length
2056 mm / 80.9 in
Width
795 mm / 31.3 in
Fuel Capacity
13 Litres / 3.43 US gal
Wet Weight
170 kg / 375 lbs
Displacement
398 cc / 24.3 cu-in
Engine Detail
Four stroke, DOHC, single cylinder, 4 valves
Bore x Stroke
89.0 x 64.0mm
Compression Ratio
12.1:1
Cooling System
Liquid cooled
Emissions
Euro 5
Fuel Induction
Bosch ride-by-wire EFI
Starter
Electric
Clutch
Wet multiplate with assist and slip functions
Final Drive
X-ring chain
Transmission / Drive
6-Speed
Frame Type
Hybrid spine/perimeter, tubular steel, bolt-on rear subframe
Suspension - Front
43mm Showa Big Piston, non-adjustable inverted fork
Suspension - Rear
Single shock, fixed damping with the shock adjustable piggy-back reservior
Rake
26.6°
Swingarm
Twin-sided, cast aluminium alloy
Trail
101.6 mm / 4 in
Wheel Travel - Front
139.7 mm / 5.5 in
Wheel Travel - Rear
129.4 mm / 5.1 in
Instrumentation
Analogue speedometer with integrated multi-function LCD screen
Brakes - Front
Single 300 mm disc with radially mounted 4-piston caliper
Brakes - Rear
Single 230 mm disc with floating caliper
ABS
Bosch dual channel
Tyres - Front
110/70 x R17
Tyres - Rear
150/60 x R17
Wheels - Front
17 x 3 in with 10-spoke cast aluminium alloy rims
Wheels - Rear
17 x 4 in with 10-spoke cast aluminium alloy rims
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
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