It may be a bit unusual, but Bajaj Auto has delivered a mid-cycle upgrade to its flagship Pulsar NS400Z barely a year after its launch. Driven by direct consumer and expert feedback, and a desire to fine-tune the performance identity of the NS badge, the latest iteration now delivers 42.4 bhp in sport mode, resulting in sharper acceleration figures, MRF radial tyres for more grip and a newly developed quickshifter for clutchless shifting in sport mode. With a price increase of INR 7,000, the number of updates certainly raises eyebrows — let's take a closer look.
Engine Enhancements
As we rode it earlier, the single-cylinder NS400 was not exactly a slowpoke. Now Bajaj has introduced forged pistons, a step up in durability and heat resistance, paired with optimised cam timing and improved valve train configurations. These changes allow the bike to rev higher. The redline is now at 10,700 rpm in Sport mode (up from 9,700 rpm) and 10,300 rpm in Road mode.
This tuning helps enhance peak output of 42.4 bhp at 9,000 rpm in Sport mode, a tasty jump from the earlier 39.5 bhp. Peak torque remains a healthy 35 Nm, now arriving at 7,500 rpm, and the powerband has been extended at the top end. Acceleration is quicker too, 0 to 60 kmph now takes 2.7 seconds (0.5 seconds quicker), while 0 to 100 kmph is dispatched in 6.4 seconds (0.9 seconds faster). The top speed has gone up to 157 kmph. It picks up through the transmission with urgency, especially feeling free-breathing above 7k revs. The low-speed fuelling still remains a bit rough, perhaps a longer throw on the clutch might make things easier.
Software-Led Shift Speed
Furthering the aggression quotient Bajaj has introduced a ‘Sport Shift’ feature, a sensor-less quickshifter calibrated exclusively for Sport mode. The in-house developed system uses software algorithms rather than a traditional physical sensor, and delivers clutchless upshifts. Under aggressive throttle inputs, you have to drop the throttle yourself to facilitate the sans-pressure-sensor shifter, up or down. Honestly, we will need more saddle time with this sport shifter to understand it better. The company claims parity with sensor-based systems in terms of response within Sport mode, though it does not function in Road or Rain modes to avoid a mismatch in calibration and shifting quality.
Bajaj also clarified that this quickshifter feature will not be backfitted to earlier 39.5 bhp bikes, as the underlying engine changes are integral to its function. However, existing customers with the bumped-up 42.4 bhp engine spec from recent batches can get it enabled via a software update.
Tyres & Brakes Add To Confidence
To harness all those added ponies, the new NS400Z gets Apollo Alpha H1 radial tyres replacing the earlier non-radial mix that drew criticism. These tyres, besides improving grip and stability under lean, also help optimise the unsprung mass and dynamic feedback during high-speed cornering or emergency braking. Despite us leaning them to ridiculous angles, the sticky rubber is excellent in grip right from the get-go; absolutely wonderful!
The front brakes now get sintered pads, another upgrade born out of feedback, offering better bite and fade resistance. The front suspension too has been subtly retuned to accommodate the dynamics of the new tyres. We noticed a firmer, more planted front end without compromising comfort in urban use. And with that exceptional brake bite, it makes it a sharper and safer front end.
Performance Modes
The NS400Z continues to offer three ride modes, Rain, Road, and Sport, each with separate power maps to suit diverse riding conditions. However, the updated engine map in all three now shows stronger top-end extension in Sport mode where the benefits of the quickshifter and high revving nature are best experienced. The torque curve remains flat, but it tapers off more predictably near the redline avoiding any power drop-off.
The entire update, from engine to software, was executed within six to seven months of receiving the initial media feedback. Bajaj’s engineers validated the feedback and deployed resources quickly reflecting agility in product development.
Understated Visuals & Familiar Ergonomics
The chassis and bodywork remain unchanged. Bajaj has not introduced any new colourways or visual tweaks to distinguish the upgrade. While this helps preserve the NS series’ identity, especially for export markets where it’s a recognisable face, some visual differentiation for the 42.4 bhp variant could have enhanced the update’s appeal.
The NS400Z remains ergonomically neutral. With a slightly aggressive stance that balances city commuting comfort and highway capability, it has a comfy saddle to sit in. No changes have been made to ground clearance (165 mm) or kerb weight (174 kg), maintaining its current handling and load characteristics. Taller riders may feel a bit cramped on those high set footpegs though.
Export-Ready Flagship
With export figures already showing a healthy rise to 3,700 units per month (up from 1,600 at launch), the NS400Z now outsells its domestic counterpart overseas. Its performance credentials, especially with radial tyres and a quickshifter, make it an attractive proposition in Latin America, Southeast Asia and other emerging markets where Bajaj has a strong footprint.
On the domestic front, the NS400Z continues to find favour in southern, western, and northeastern regions, territories where higher displacement Pulsars have traditionally performed well.
With this mid-cycle update, Bajaj has addressed the original shortcomings of the NS400Z with engineering clarity and commercial urgency. The introduction of forged internals, reworked power delivery, radial tyres, sintered pads, and a software-led quickshifter is a reminder that even within value-conscious segments, customer expectations are maturing.
At INR 1.92 lakh (ex-showroom), the NS400Z remains one of the best price-to-performance motorcycles in its segment, and with these upgrades, it’s definitely more deserving than ever of the ‘flagship’ Pulsar title. Can we please have another bucket list version, with the same upgrades, but with a cable throttle and no power modes, tee hee!
Photography: Mohd Nasir
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