![Triumph 400cc TR Series engine badge)](https://media.triumphmotorcycles.co.uk/image/upload/f_auto/q_auto/sitecoremedialibrary/media-library/images/motorcycles/modern-classics/t%20series/scrambler%20400%20x/scrambler%20400%20x%20reasons%20to%20ride%20page/engine/scrambler-400-x-my24-r2r-engine-hero-revised-768.jpg)
REASONS TO RIDE
Engine
ALL-NEW ENGINE
The all-new fuel-injected, 398cc single-cylinder engine combines Triumph’s trademark modern classic style with state-of-the-art engineering to deliver a class-beating 39 HP and 28 LB-FT of peak torque, with an evocative, rich, and distinctive exhaust note.
Technical highlights include a four-valve, DOHC cylinder head and a crankshaft that was perfectly weighted and balanced to optimize inertia for low-speed drivability. A finger-follower valvetrain with low reciprocating mass, and DLC coatings which reduce friction, contribute to an incredible engine performance which is free-revving yet tractable.
The six-speed gearbox delivers light, precise gear selection with ratios perfectly spaced to make the most of this exciting, characterful, and torque-rich engine.
![Triumph Speed 400](https://media.triumphmotorcycles.co.uk/image/upload/f_auto/q_auto/sitecoremedialibrary/media-library/images/motorcycles/modern-classics/t%20series/speed%20400/speed%20400_my24_carnival%20red_rhs_537.jpg)