How much is a used Triumph Bonneville T120 worth?

A 2023 Triumph Bonneville T120 in good condition with around 9,000 miles is worth roughly £8,450 (typical range £7,600–£9,300). 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 Triumph Bonneville T120 depreciate?

We don't yet hold model-specific depreciation for the Triumph Bonneville T120. Our default estimate for machines of this kind is a loss of about 26% 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 Triumph Bonneville T120 on an A2 licence?

No. The Triumph Bonneville T120 needs a full category A licence — 80 PS puts it beyond what A2 allows, and it isn't offered as a restrictable model.

How much does it cost to insure a Triumph Bonneville T120?

Expect around £460 a year to insure a Triumph Bonneville T120, typically £340–£660. That assumes age 40, full license, 5yrs NCB, suburban 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 Triumph Bonneville T120?

The wear and failure points we track for the Triumph Bonneville T120 are: cam chain tensioner rattle (around 20k+ mi, £300); chain & sprockets (around 12-16k mi, £260); front brake pads (around 10-14k mi, £90-110). 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 Triumph Bonneville T120 cost to run?

Expect around 55 mpg, about £396 a year in fuel or energy, £320 for an annual service, £320 a pair for tyres every 9,000 miles, £230 for a chain and sprockets every 15,000 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 Triumph Bonneville T120 likely to be stolen?

The Triumph Bonneville T120 is a moderate theft target. Premium Triumph with strong used demand — popular target. Chain + disc lock + cover essential overnight; garage if possible. 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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Modern classicLicense A (Unrestricted)2,900/yr UK

Triumph Bonneville T120

Triumph's flagship modern-classic — 1200cc parallel twin with traditional 1959 Bonneville styling. Bigger, smoother and more refined than the T100 sibling. 80bhp, 105Nm torque, twin shocks, spoked wheels, traditional round headlight. Built in Hinckley, UK. Hand-finished details (brushed alloy mudguards, twin-clock dashes, peashooter exhausts) justify the price over the smaller T100. Genuinely premium feel without going to specialty brands like Norton.

Engine: 1200 cc
Power: 80 PS
Weight: 236 kg
Seat height: 790 mm
A2 licence: —

The short version

64/100

Forecourt score

Value 61 · Insurance 66 · Theft 65

The Triumph Bonneville T120 costs about average to insure (around £460/yr typical). Theft risk is moderate. We don't yet hold model-specific depreciation for the Triumph Bonneville T120; our default estimate is around 26% 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.

Pick your version

Estimates are tuned to the version you choose.

Engine

Petrol · 1200cc

Power

80 ps

Torque

105 Nm

Weight

236 kg

Seat

790 mm

Transmission

6-speed manual

Economy

55 mpg

Standard T120 — 1200cc parallel twin, 80bhp, 6-speed. Twin shocks, spoked wheels, twin-clock dash. Premium Triumph build quality. 14.5L tank.

Tell us about the one you're looking at

Year of registration2023

20162026

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

£8,436

Range £7,592 – £9,280

HIGH CONFIDENCE

When new (2023)£11,400

Age-based value£8,436

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

£12,200

At 5 years

£7,808

At 10 years

£5,612

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 depreciation26% lost

Years 3–7Used-market sweet spot16% lost

Years 7–15Stable / vintage-cult zone22% lost

After year 3: 74% retainedAfter year 7: 58% retainedAfter year 15: 36% 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

£2,695

Per year

£898

Per mile

£0.30

Servicing£960

Tyres (pair)£320

Chain & sprockets£138

MOT£89

Fuel / energy£1,188

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

£460/ year

Roughly £38 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	£759	£1,012	£1,417
Age 22-29	£466	£621	£869
Age 30-39Selected	£345	£460	£644
Age 40-49	£304	£405	£567
Age 50+	£276	£368	£515

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

Premium Triumph with strong used demand — popular target. Chain + disc lock + cover essential overnight; garage if possible.

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
medium	Cam chain tensioner rattle Audible at cold start; replaceable at major service 20k+ mi	20k+ mi	£300
medium	Chain & sprockets 12-16k mi	12-16k mi	£260
medium	Exhaust corrosion (peashooter pipes) Chrome plating on header pipes corrodes faster than satin finishes 5-7 years	5-7 years	£500 pair
low	Front brake pads 10-14k mi	10-14k mi	£90-110
low	Battery every 4 years	every 4 years	£110-130

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 Triumph Bonneville T120, 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.

All variants

Trim	Engine	PS	kg	Seat	A2-restrict?
Bonneville T120default	Liquid-cooled SOHC 8-valve parallel-twin, 1200cc	80	236	790	—
Bonneville T120 Black	Liquid-cooled SOHC 8-valve parallel-twin, 1200cc	80	236	790	—

Strengths

+Hinckley-built UK quality — hand-finished details
+80bhp + 105Nm gives genuinely big-bike feel
+Holds value well — strong used demand
+10,000-mile service intervals (long for a parallel-twin)
+Authentic 1959-styling without retro-replica feel

Watch-outs

−Heavy (236kg wet) — feels it at parking-lot speeds
−Chrome corrodes in UK winter without aftercare
−Service costs higher than Japanese rivals
−Comes with peashooter exhausts that decay aesthetically faster than satin

Value this bike All bikes

Related bikes

Common questions

Triumph Bonneville T120, answered from the data

How much is a used Triumph Bonneville T120 worth?: A 2023 Triumph Bonneville T120 in good condition with around 9,000 miles is worth roughly £8,450 (typical range £7,600–£9,300). 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 Triumph Bonneville T120 depreciate?: We don't yet hold model-specific depreciation for the Triumph Bonneville T120. Our default estimate for machines of this kind is a loss of about 26% 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 Triumph Bonneville T120 on an A2 licence?: No. The Triumph Bonneville T120 needs a full category A licence — 80 PS puts it beyond what A2 allows, and it isn't offered as a restrictable model.
How much does it cost to insure a Triumph Bonneville T120?: Expect around £460 a year to insure a Triumph Bonneville T120, typically £340–£660. That assumes age 40, full license, 5yrs NCB, suburban 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 Triumph Bonneville T120?: The wear and failure points we track for the Triumph Bonneville T120 are: cam chain tensioner rattle (around 20k+ mi, £300); chain & sprockets (around 12-16k mi, £260); front brake pads (around 10-14k mi, £90-110). 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 Triumph Bonneville T120 cost to run?: Expect around 55 mpg, about £396 a year in fuel or energy, £320 for an annual service, £320 a pair for tyres every 9,000 miles, £230 for a chain and sprockets every 15,000 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 Triumph Bonneville T120 likely to be stolen?: The Triumph Bonneville T120 is a moderate theft target. Premium Triumph with strong used demand — popular target. Chain + disc lock + cover essential overnight; garage if possible. 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.