Suzuki GSX-S125
Suzuki's 125 naked — sister to the GSX-R125 sportbike, sharing the same 124cc DOHC 4-valve single. 14.7bhp, naked sport-styled, A1 license CBT-friendly. Light (134kg wet), low seat (785mm), forgiving fueling. Generally cheaper than equivalent Honda CB125R or KTM 125 Duke. Strong learner-friendly choice with Suzuki's reputation for low maintenance.
- Engine
- 124 cc
- Power
- 14.7 PS
- Weight
- 134 kg
- Seat height
- 785 mm
- A2 licence
- —
Liquid-cooled DOHC 4V single
wet
The short version
Forecourt score
Value 50 · Insurance 88 · Theft 65
The Suzuki GSX-S125 holds its value about as well as most bikes (around 30% lost over three years, against the 25-32% bike norm) and is cheap to insure (around £260/yr typical). Theft risk is moderate.
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.
Variant: GSX-S125
Engine
Petrol · 124cc
Power
14.7 ps
Torque
11.5 Nm
Weight
134 kg
Seat
785 mm
Transmission
6-speed manual
Economy
115 mpg
Standard GSX-S125 — 124cc DOHC, 14.7bhp, 6-speed. Naked styling, low 785mm seat, 11L tank, Bosch ABS standard.
Tell us about the one you're looking at
Tidy and well looked-after for its age — the typical clean bike.
Estimated market value
£2,869
Range £2,582 – £3,156
HIGH CONFIDENCE
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
£4,399
At 5 years
£2,639
At 10 years
£1,848
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.
UK new price by year
How we estimate this
Phase depreciation derived from observed UK used-bike pricing — classified ads, dealer asking prices, and end-of-auction figures. Bike residuals depend heavily on theft history, service-stamp count, and crash-damage signatures. The figures here are indicative for clean, fully-stamped examples.
What it costs to own
Indicative running costs at 8,000 miles a year — the UK rider average. 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
£1,229
Per year
£410
Per mile
£0.05
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 £1.45/L. 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 yearsRisk profile
Estimated annual premium · typical, age 30-39
£260/ year
Roughly £22 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 | £429 | £572 | £801 |
| Age 22-29 | £263 | £351 | £491 |
| Age 30-39Selected | £195 | £260 | £364 |
| Age 40-49 | £172 | £229 | £320 |
| Age 50+ | £156 | £208 | £291 |
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
Medium risk
Some theft pattern, particularly in urban postcodes. Thatcham-approved chain plus disc lock recommended; secure overnight parking helps premiums.Theft hotspot postcodes
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
Less stolen than Honda or KTM 125s due to lower parts demand. Chain + disc lock still 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
0
Medium
2
Low / cosmetic
3
| Severity | Part / issue | Cost |
|---|---|---|
| medium | Chain & sprockets 8-12k mi | £130 |
| medium | Fuel pump (rare) 20k+ mi | £250 |
| low | Front brake pads 6-9k mi | £50-70 |
| low | Battery every 3 years | £60-80 |
| low | Side stand switch Causes intermittent no-start; common Suzuki small-bike service item 10k+ mi | £40 |
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 Suzuki GSX-S125, or your exact vehicle, has any outstanding recalls on the official DVSA service.
Check on GOV.UKOpens the Driver & Vehicle Standards Agency recall checker. Choose the make, model and year of manufacture — no registration needed.
Strengths
- +Cheaper new than Honda CB125R or KTM 125 Duke
- +115+ mpg real-world
- +Low 785mm seat — friendly for shorter or new riders
- +Bosch ABS standard
- +Suzuki reliability + simpler engine than rivals
Watch-outs
- −Plainer styling than Honda or KTM rivals
- −Less premium spec than Honda CB125R (no SFF-BP forks)
- −Side stand switch failures known
- −Lower used residual values than Honda equivalents