How much is a used Kawasaki Ninja 400 worth?

A 2023 Kawasaki Ninja 400 in good condition with around 9,000 miles is worth roughly £4,200 (typical range £3,800–£4,600). Dealer asking prices sit higher than private sales, and a full service history, no crash damage and an unbroken theft record are what hold a bike at the top of its range.

How quickly does the Kawasaki Ninja 400 depreciate?

We don't yet hold model-specific depreciation for the Kawasaki Ninja 400. Our default estimate for machines of this kind is a loss of about 30% over three years, against a 25–32% norm for bikes generally — treat it as a starting point rather than a measurement of this model. Bikes hold value considerably better than cars, which typically lose 40–50% over the same period.

Can you ride the Kawasaki Ninja 400 on an A2 licence?

Yes. The Kawasaki Ninja 400 sits inside the A2 power and power-to-weight limits as standard, so no restrictor is needed.

How much does it cost to insure a Kawasaki Ninja 400?

Expect around £380 a year to insure a Kawasaki Ninja 400, typically £280–£540. That assumes age 22, A2 license, 1yr NCB, urban postcode. Bike premiums move far more on licence tier, rider age and postcode than car premiums do, so treat this as a starting point rather than a quote.

What goes wrong on a used Kawasaki Ninja 400?

The wear and failure points we track for the Kawasaki Ninja 400 are: chain & sprockets (around 10-14k mi, £160); front brake pads (around 8-12k mi, £60-80); battery (around every 3-4 years, £80). We don't publish a reliability score for bikes — the MOT dataset behind our car scores doesn't support one at model level — so treat these as the specific things to inspect rather than a verdict. A full service history and a fresh MOT without advisories remain the best protection.

What does a Kawasaki Ninja 400 cost to run?

Expect around 60 mpg, about £363 a year in fuel or energy, £200 for an annual service, £220 a pair for tyres every 7,000 miles, £270 for a chain and sprockets every 12,000 miles. Figures assume 3,000 miles a year, the UK average from DfT travel and traffic statistics, and current DESNZ pump prices. The cost-of-ownership table on the profile breaks this down per year and per mile.

Is the Kawasaki Ninja 400 likely to be stolen?

The Kawasaki Ninja 400 is a moderate theft target. Light sportbike, popular target for young riders — chain + disc lock essential. Theft is concentrated in E, N, SE, SW postcode areas. A Thatcham-approved chain and ground anchor, a disc lock and a tracker are what insurers look for, and secure overnight storage moves a premium more than almost anything else.

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SportLicense A2 (19+)2,700/yr UK

Kawasaki Ninja 400

Kawasaki's small sportbike — 399cc parallel twin, 45bhp. The benchmark A2-license sportbike in the UK. Light (167kg wet), narrow, agile, with race-replica styling matching the larger Ninja ZX-6R. Strong used market — many new riders graduate from 125 to Ninja 400 as their first big bike. Replaced by the Ninja 500 in 2024, but Ninja 400 remains the better seller on the used market.

Engine: 399 cc
Power: 45 PS
Weight: 167 kg
Seat height: 785 mm
A2 licence: —

The short version

62/100

Forecourt score

Value 50 · Insurance 74 · Theft 65

The Kawasaki Ninja 400 costs about average to insure (around £380/yr typical). Theft risk is moderate. It's A2-licence legal in standard form. The main thing to check on a used one is the stator (rare). We don't yet hold model-specific depreciation for the Kawasaki Ninja 400; our default estimate is around 30% lost over three years.

A bike-specific blend of value retention, insurance and theft risk (weighted 40/35/25). Bikes carry no MOT reliability data, so reliability isn't scored. Higher is better. The value pillar uses our default estimate for this bike, not a model-specific figure.

Variant: Ninja 400

Engine

Petrol · 399cc

Power

45 ps

Torque

38 Nm

Weight

167 kg

Seat

785 mm

Transmission

6-speed manual

Economy

60 mpg

Standard Ninja 400 — 399cc parallel twin, 45bhp, 6-speed. A2-compliant out of the box. 14L tank. Discontinued 2024 in favour of Ninja 500 (same chassis, 451cc engine).

Tell us about the one you're looking at

Year of registration2023

20182023

Mileage on the clock9,000 mi

0Expected: 9,00060k

Conditiongood

PoorFairGoodExcellent

Tidy and well looked-after for its age — the typical clean bike.

Estimated market value

£4,199

Range £3,779 – £4,619

HIGH CONFIDENCE

When new (2023)£5,999

Age-based value£4,199

Mileage adjustment+£0

Condition adjustment+£0

Holding value

Bikes hold value far better than cars — typical motorcycle 3-year depreciation is 25–32%, against cars' 40–50%. Some bikes (Hayabusa, Gold Wing, classic Z1000) actually appreciate in the 7–15 year zone as cult demand outstrips supply.

New

£5,999

At 5 years

£3,599

At 10 years

£2,520

Value loss by phase

Each band shows the share of original value lost during that window — not cumulative. Appreciation (green, marked +X% gained) is real for bikes that develop cult status.

Years 0–3First-owner depreciation30% lost

Years 3–7Used-market sweet spot18% lost

Years 7–15Stable / vintage-cult zone26% lost

After year 3: 70% retainedAfter year 7: 52% retainedAfter year 15: 26% retained

UK new price by year

How we estimate this

We don't yet hold model-specific depreciation for this bike. The figures above are our default estimate for machines of this kind, currently applied to 34 models in the catalogue — treat them as a starting point, not a measurement of this model. Bike residuals depend heavily on theft history, service-stamp count and crash-damage signatures. Figures assume a clean, fully-stamped example.

What it costs to own

Over

Indicative running costs at 3,000 miles a year — the UK average from DfT travel and traffic statistics. Chain-drive bikes carry a chain/sprocket consumable line; tax (typically £25–£100/yr) and depreciation are excluded — see the section above for value retention.

3-year total

£2,263

Per year

£754

Per mile

£0.25

Servicing£600

Tyres (pair)£283

Chain & sprockets£203

MOT£89

Fuel / energy£1,089

Service costs assume independent specialist labour and OE parts. Tyre intervals reflect typical UK road riding — track-day usage burns through rear tyres in <2,000 miles. Fuel uses the variant MPG at the current DESNZ pump price of £1.60/L (week commencing 03/08/2026). Electric bikes are costed from battery capacity and published range at the current domestic electricity price; where a bike has no published range we show no energy line rather than guess. Lower-mileage riders see proportionally lower totals; higher-mileage commuters pay roughly linearly more.

Estimated insurance

ABI motorcycle scheme · Comprehensive · 5 yr NCB

Indicative annual comprehensive premiums for this bike. Bike insurance is far more sensitive to licence tier and rider age than cars — pick the combination closest to your circumstances.

Licence

Age

No-claims bonus

5 years

0 yearsBaseline: 5 years15+

Risk profile

Estimated annual premium · typical, age 30-39

£380/ year

Roughly £32 per month

Typical

Suburban postcode, 3+ years NCB, standard security (Thatcham chain + disc lock), no recent claims.

Age band	Lower risk	Typical	Higher risk
Age 17-21	£627	£836	£1,170
Age 22-29	£385	£513	£718
Age 30-39Selected	£285	£380	£532
Age 40-49	£251	£334	£468
Age 50+	£228	£304	£426

How we estimate this

Premiums combine licence tier, rider age, no-claims bonus and a risk-profile multiplier on top of a bike-specific baseline. Bike insurance is materially more sensitive to licence tier (CBT / A1 / A2 / A) than car insurance, and young riders pay considerably more than older riders even on the same machine. Always get individual quotes before buying.

Theft risk

Bike-specific · Met Police + insurance reporting

UK bike theft rates are an order of magnitude higher than car theft. Nakeds and supersports lose more to professional gangs; large adventure bikes and tourers are statistically much safer.

Theft risk score · 1 to 4

2/4Medium risk

1 — Low2 — Medium3 — High4 — Very high

Medium risk

Some theft pattern, particularly in urban postcodes. Thatcham-approved chain plus disc lock recommended; secure overnight parking helps premiums.

Theft hotspot postcodes

ENSESW

Postcode prefixes only; full London hot zone runs across E, N, NW, SE, SW, W boroughs depending on the model.

What this means for you

Light sportbike, popular target for young riders — chain + disc lock essential.

How we set this band

Bands derived from Met Police bike-theft reporting (most-stolen lists) cross-referenced with insurance industry underwriting data. Model + postcode are the two biggest factors in motorcycle theft risk in the UK, materially more than vehicle value.

What goes wrong

5 known issues · sorted by severity

Documented failure modes from UK owner forums, dealer service bulletins, and aggregated mechanic feedback. Mileages are approximate — different riders see different intervals depending on use and maintenance. Always address "high"-severity items before resale.

High severity

Medium

Low / cosmetic

Severity	Part / issue	Typical mileage	Cost
high	Stator (rare) Charging issues — known on older Ninja 400s 25k+ mi	25k+ mi	£350-500
medium	Chain & sprockets 10-14k mi	10-14k mi	£160
low	Front brake pads 8-12k mi	8-12k mi	£60-80
low	Battery every 3-4 years	every 3-4 years	£80
low	Tyres (Dunlop Sportmax) 7-9k mi rear	7-9k mi rear	£220 pair

How we score severity

High — strands the bike or causes consequential damage if left. Medium — service item that affects ride quality or risks failure. Low — cosmetic or minor inconvenience. Costs are independent-specialist UK rates for parts and labour together; main dealer prices typically run 30–50% higher.

Safety recalls

Manufacturers occasionally issue safety recalls to fix a fault free of charge. You can check whether the Kawasaki Ninja 400, or your exact vehicle, has any outstanding recalls on the official DVSA service.

Check on GOV.UK

Opens the Driver & Vehicle Standards Agency recall checker. Choose the make, model and year of manufacture — no registration needed.

Strengths

+Benchmark A2 sportbike
+Light (167kg) — easy at low speed
+60mpg achievable — better economy than parallel-twin rivals
+Strong used market — easy to sell on
+Race-replica styling matching bigger Ninjas

Watch-outs

−Discontinued 2024 — used market only now
−Stator failures known on higher-mileage examples
−Aggressive sportbike posture
−Replaced by Ninja 500 (same chassis, more power)

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Common questions

Kawasaki Ninja 400, answered from the data

How much is a used Kawasaki Ninja 400 worth?: A 2023 Kawasaki Ninja 400 in good condition with around 9,000 miles is worth roughly £4,200 (typical range £3,800–£4,600). Dealer asking prices sit higher than private sales, and a full service history, no crash damage and an unbroken theft record are what hold a bike at the top of its range.
How quickly does the Kawasaki Ninja 400 depreciate?: We don't yet hold model-specific depreciation for the Kawasaki Ninja 400. Our default estimate for machines of this kind is a loss of about 30% over three years, against a 25–32% norm for bikes generally — treat it as a starting point rather than a measurement of this model. Bikes hold value considerably better than cars, which typically lose 40–50% over the same period.
Can you ride the Kawasaki Ninja 400 on an A2 licence?: Yes. The Kawasaki Ninja 400 sits inside the A2 power and power-to-weight limits as standard, so no restrictor is needed.
How much does it cost to insure a Kawasaki Ninja 400?: Expect around £380 a year to insure a Kawasaki Ninja 400, typically £280–£540. That assumes age 22, A2 license, 1yr NCB, urban postcode. Bike premiums move far more on licence tier, rider age and postcode than car premiums do, so treat this as a starting point rather than a quote.
What goes wrong on a used Kawasaki Ninja 400?: The wear and failure points we track for the Kawasaki Ninja 400 are: chain & sprockets (around 10-14k mi, £160); front brake pads (around 8-12k mi, £60-80); battery (around every 3-4 years, £80). We don't publish a reliability score for bikes — the MOT dataset behind our car scores doesn't support one at model level — so treat these as the specific things to inspect rather than a verdict. A full service history and a fresh MOT without advisories remain the best protection.
What does a Kawasaki Ninja 400 cost to run?: Expect around 60 mpg, about £363 a year in fuel or energy, £200 for an annual service, £220 a pair for tyres every 7,000 miles, £270 for a chain and sprockets every 12,000 miles. Figures assume 3,000 miles a year, the UK average from DfT travel and traffic statistics, and current DESNZ pump prices. The cost-of-ownership table on the profile breaks this down per year and per mile.
Is the Kawasaki Ninja 400 likely to be stolen?: The Kawasaki Ninja 400 is a moderate theft target. Light sportbike, popular target for young riders — chain + disc lock essential. Theft is concentrated in E, N, SE, SW postcode areas. A Thatcham-approved chain and ground anchor, a disc lock and a tracker are what insurers look for, and secure overnight storage moves a premium more than almost anything else.

Answers are generated from this bike's Forecourt data — curated specifications, our valuation model and the week's DESNZ fuel and energy prices — and update with the weekly data refresh.