Naked // Manual // 2024 // CBT Legal
KTM
Duke 125
Ready to race. At any age.
Power
15 bhp
Weight
144kg
Top Speed
82 mph
From New
£5,099
Profile silhouette
17" cast aluminium · seat 820 mm
Colour palette
- Electronic Orange
- Atlantic Blue
- Ceramic White
Range & economy
The Duke 125 is the most aggressive learner-legal bike on sale. Steel trellis frame, WP suspension, full-colour TFT, and a riding position that screams supermoto. For 2024 it also gets a quickshifter as a factory option.
Who it's for
Riders who want a proper performance bike experience and don't mind paying KTM money to get it.
Pros
- Cornering brilliance for a 125
- Full-colour TFT with smartphone link
- Quickshifter option from factory
- Steel trellis frame and WP USD forks
Cons
- Most expensive 125 here new
- Highest insurance group
- KTM service costs above Japanese rivals
Suitability
commuter
7/10
sport
7/10
comfort
6/10
value
5/10
style
6/10
Full Specifications
- Engine
- Single-cylinder, 4-stroke, DOHC, 4-valve, liquid-cooled
- Displacement
- 124.7cc
- Power
- 15 bhp @ 9,500 rpm
- Torque
- 8.9 lb-ft @ 8,000 rpm
- Top speed
- 82 mph
- Fuel economy
- 98 mpg
- Fuel capacity
- 13.5 litres
- Weight
- 144 kg (wet)
- Seat height
- 820 mm
- Transmission
- 6-speed manual (quickshifter optional)
- ABS
- Dual-channel ABS with Supermoto mode
- Brakes
- Front: 320mm disc, 4-piston ByBre. Rear: 240mm disc.
- Suspension
- Front: WP APEX 43mm USD. Rear: WP APEX monoshock.
- Wheels & tyres
- 17" cast aluminium, Bridgestone Battlax tyres
- Service interval
- 6,000 miles / 12 months
- Warranty
- 2 years unlimited mileage
- Insurance group
- Group 12
- Available colours
- Electronic Orange, Atlantic Blue, Ceramic White
- Price new
- £5,099
- Price used
- £3,400 – £4,300
- CBT legal?
- Yes
- Keepable post-licence?
- No — learners only
True cost of owning a Duke 125
Estimates for a 25-year-old with one year of CBT licence holding, riding 4,000 miles a year in Zone 2 London. Adjust for your own circumstances.
insurance
£570 / year (third-party fire & theft, 25 yr old, London)
tax
£25 / year (motorcycles ≤150cc)
mot
£29.65 / year (compulsory from year 3)
fuel
~£269 / year at 4,000 mi (£1.45/L)
service
~£165 / minor service
Day-one essentials
ECE 22.06 full-face helmet
£120 – £400
CE Level 2 armoured jacket
£150 – £350
Disc lock + reminder cable
£35 – £75
Sold Secure Gold chain + ground anchor
£90 – £180
Tail-pack 25L
£75 – £160
All-weather cover + bike socks
£30 – £80
Best for
- Spirited riders
- Track-day curiosity
- Style-led learners
Insider trivia
- — Built in India at Bajaj's facility under KTM technical oversight.
- — Shares chassis with the RC 125 and the now-discontinued 390 Duke geometry.
- — Supermoto ABS mode allows controlled rear-wheel slides.
Owner FAQs
- Can I ride the Duke 125 on a CBT?
- Yes — the KTM 125 Duke is fully CBT-legal in the UK. With L-plates and a valid DL196 you can ride it for two years before progressing to A1, A2, or full A.
- What licence do I need to take L-plates off the Duke 125?
- You need an A1 (17+), A2 (19+) or full A (24+) licence and Module 1 / 2 pass — this 125 itself is restricted to learners.
- Is the Duke 125 reliable?
- KTM has a 2 years unlimited mileage warranty on the Duke 125. Built in India at Bajaj's facility under KTM technical oversight.
- What is the real-world range?
- Claimed economy is 98 mpg and the tank is 13.5 litres, giving a theoretical range of 291 miles. Real-world budget around 80% of that.
- What insurance group is the Duke 125?
- Group 12. As a rough guide, a 25-year-old in zone 2 London with no claims pays around £570 per year third-party fire & theft.
- Is the Duke 125 good for delivery / courier work?
- It's possible, but a scooter like the PCX 125 or SH125i is the standard courier choice. Manual gearboxes slow down stop-start delivery work.
Browse all CBT-legal 125s
Don't have your CBT yet?
You need a valid DL196 certificate before you can legally ride the Duke 125 on UK roads.
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