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Unveiling the Triumph Speed 400 and Scrambler 400 X: two revolutionary motorcycles birthed from Triumph’s partnership with Bajaj, delivering exceptional performance with a shared 398cc engine and introducing pioneering features to light-middle-weight and A2 segments.

WE’VE seen the spy shots and read (and written) some of the news articles relating to these two all-new bikes from Triumph, but today is the first time we can talk to you about the finer points of the new Triumph Speed 400 and Scrambler 400 X!

And these aren’t just all-new bikes landing in an all-new segment – they also mark the first machines to come from Triumph’s partnership with automotive giant Bajaj, a brand that is synonymous with machines heading into the light-middle-weight and A2 segment.

The new Speed 400 motorcycle

Triumph Speed 400 and Scrambler 400 X overview

While these two bikes do share many parts, there is more that divides them than first meets the eye. The engine, named the TR-Series, is obviously one common component, although there are subtle differences like the final drive that differ between the two new machines. What is the same is the single cylinder, 398cc, four-valve configuration. Both feature a DOHC architecture and a crank that is balanced and weighted for low-down grunt and rideability. Each machine features DLC-coated parts and finger-follower valve actuation, and both put out a claimed 40ps (39bhp) and 37.5Nm (27lb-ft) of torque.

Scrambler 400 X Details

The liquid-cooled single is said to exceed Euro-5 regulations, meaning its future within the Triumph range should be secured for some years to come. 

Each machine also shares a common frame and bolt-on subframe, although from there out, the chassis of each bike differs considerably. The Speed 400 comes equipped with 41mm big-piston USDs and a mono-shock at the rear with a remote reservoir. The set-up is aimed at providing a comfortable yet ‘engaging and intuitive ride’. 

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New Scrambler 400X motorcycle

The Scrambler 400 X on the other hand is naturally aimed at a slightly more rough-and-tumble type of ride, and while it could never be called an out-and-out off-roader, its 19” front wheel (the Speed 400 gains a 17” item), longer travel suspension and a longer wheelbase, should make for an entertaining and enjoyable ride on the dusty stuff.

The Scrambler 400 also features a sturdier back brake lever and slightly chunkier, lower-set foot pegs that are aimed at providing the rider with a more comfortable position when standing on the pegs off-road.

Scrambler 400 X

On the technology front, the two bikes once again share the tech equally, boasting LED headlights, analogue/LED hybrid dash designs, traction control and ABS (two-channel) – which is switchable on the Scrambler 400 X for off-road riding – and a torque-assisted slipper clutch. They also both come with factory-installed immobilisers, peace of mind and no doubt helpful for when younger riders are looking for insurance!

Pricing for the two new models is as yet TBC, although Triumph is claiming them to be ‘extremely competitive’, and with 10,000-mile services and a two-year unlimited mileage warranty, it’s already looking like a fairly good deal right off the bat!

Triumph Speed 400 and Scrambler 400 X

Triumph Speed 400 and Scrambler 400 X specs

Engine and transmission

 Speed 400Scrambler 400 X
TypeLiquid-cooled, 4 valve, DOHC, single-cylinder
Capacity398.15 cc
Bore89.0 mm
Stroke64.0 mm
Maximum Power40 PS / 39.5 bhp (29.4 kW) @ 8,000 rpm
Maximum Torque37.5 Nm @ 6,500 rpm
Fuel SystemBosch electronic fuel injection with electronic throttle control
ExhaustStainless twin-skin header system with stainless steel silencer
Final DriveX-ring chain
ClutchWet, multi-plate, slip & assist


 Speed 400Scrambler 400 X
FrameHybrid spine/perimeter, tubular steel, bolt-on rear subframe
SwingarmTwin-sided, cast aluminium alloy
Front WheelCast aluminium alloy 10 spoke, 17 x 3 inCast aluminium alloy 10 spoke, 19 x 2.5 in
Rear WheelCast aluminium alloy 10 spoke, 17 x 4 inCast aluminium alloy 10 spoke, 17 x 3.5 in
TyresMetzeler Sportec M9RRMetzeler Karoo Street
Front Tyre Size110/70 R17100/90 R19
Rear Tyre Size150/60 R17 140/80 R17
Front Suspension43mm upside down Big Piston forks.
140mm wheel travel
43mm upside down Big Piston forks.
150mm wheel travel
Rear SuspensionGas monoshock RSU with external reservoir and pre-load adjustment.
130mm wheel travel
Gas monoshock RSU with external reservoir and pre-load adjustment.
150mm wheel travel
Front Brakes300mm fixed disc,
four-piston radial caliper, ABS
320mm fixed disc,
four-piston radial caliper, ABS
Rear Brakes230mm fixed disc, floating caliper, ABS230mm fixed disc, floating caliper, ABS
InstrumentsAnalogue speedometer with integrated multi-function LCD screen


 Speed 400Scrambler 400 X
Length2056 mm2117 mm
Width (Handlebars)795 mm825 mm
Height (Without Mirrors)1075 mm1190 mm
Seat Height 790 mm835 mm
Wheelbase1377 mm1418 mm
Rake 24.6°23.2°
Trail 102 mm108 mm
Wet Weight*170kg179kg
Fuel Tank Capacity13 litres

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Australian Motorcyclist Magazine is Australia's leading motorcycle travel magazine.

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