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MEET THE Speed 400
The Bajaj Pulsar NS400 (Speed 400) is the middleweight sports bike that proves you don't need 600cc to have serious fun. With its 373cc liquid-cooled engine, upside-down forks, and dual-channel ABS, this machine delivers genuine sports bike thrills at an accessible price point. It's designed for riders who want track-ready performance without the premium tag.
Who Should Buy the Speed 400?
The Speed 400 is perfect for experienced riders upgrading from 250cc bikes who crave more power and performance. If you appreciate responsive handling, enjoy spirited riding, and want a true sports bike rather than a commuter with fairings, this is your machine. Riders who track days on weekends or want a capable weekend warrior will find the Speed 400 delivers excellent value for the performance.
Who Shouldn't Buy the Speed 400?
Casual commuters and beginners should look at lower-displacement bikes—the Speed 400's sporty ergonomics and sharp handling demand active rider input. If long-distance touring is your goal, the aggressive riding position becomes fatiguing. Budget-conscious riders might balk at the price compared to entry-level 250cc nakeds. Highway cruising riders will find it twitchier than they'd prefer.
Speed 400 Engine Performance & Mileage
The 373cc single-cylinder liquid-cooled engine is a jewel. Delivering 40 bhp at 8,000 rpm and 37 Nm of torque at 6,500 rpm, acceleration is brisk and responsive. The 6-speed gearbox with an upshift-only quickshifter transforms gear changes into a refined operation. Fuel efficiency sits at a respectable 35 km/l, managed through efficient fuel injection. The engine breathes through a 4-valve DOHC head, generating a thrilling top speed of 180 km/h.
40 bhp of pure sports bike thrills—the Speed 400 proves performance doesn't require a massive displacement.
Speed 400 Comfort & Ergonomics
The Speed 400 prioritizes performance over comfort. The 800mm seat height suits taller riders, while the aggressive riding position channels weight forward for spirited riding. The clip-on bars demand an athletic posture, which feels natural when attacking corners but becomes demanding on slower commutes. Suspension is firm, tuned for precision rather than plush comfort—front upside-down forks and a rear monoshock work together to keep the bike planted.
Speed 400 Braking & Handling
Handling is a key strength. The 17-inch alloy wheels wrapped in tubeless tires, combined with upside-down forks and an adjustable monoshock, create a composed, flickable package. The 320mm front and 230mm rear disc brakes backed by cornering-aware dual-channel ABS provide confident deceleration from any angle. Corner entry is sharp, mid-corner stability is excellent, and the bike rewards smooth, precise inputs with predictable, confidence-inspiring behavior.
Speed 400: Things to Know Before Buying
The aggressive ergonomics aren't a bug—they're a feature for sports riding, but they do matter for daily commuting. Spares are reasonably available through the Bajaj network, though insurance costs are moderate. The bike lacks storage (no underseat space), so touring requires hard luggage. Break-in period is important; respect the speed limits during the first 600 km for optimal engine longevity.
Upside-down forks and cornering ABS make this middleweight a canyon carving weapon at half the price of 600cc rivals.
Speed 400 Maintenance & Running Costs
Maintenance costs are reasonable for this performance level. The liquid-cooled engine requires regular coolant flushes, and the premium tires and brake pads will cost more than economy options. Bajaj's service network is extensive, and parts availability is good. Fuel costs are modest thanks to decent efficiency. Overall running costs sit comfortably in the mid-range—more expensive than a commuter, less than a big-bike.
FUN FACT
The Pulsar NS400 engine is a development of the Bajaj-KTM partnership, sharing engineering DNA with larger KTM singles. This pedigree explains its impressive performance and refinement for a single-cylinder design.
BOTTOM LINE
The Speed 400 is the thinking enthusiast's sports bike—sophisticated engineering, genuine performance, and accessible pricing in one sharp package. If you want track-capable handling, brisk acceleration, and the soul of a sports bike without the premium cost, the Speed 400 deserves serious consideration. It's not the most comfortable or practical, but that's by design.