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SUZUKI GSX-S125 (2017-on) Review

Published: 11 September 2017

Updated: 19 July 2019

The L-plate compliant Suzuki offers riding thrills with the added bonus of comfort and practicality.

SUZUKI GSX-S125  (2017-on)

The L-plate compliant Suzuki offers riding thrills with the added bonus of comfort and practicality.

Overall Rating 4 out of 5

Having ridden the GSX-R125 on its launch the day before, I was convinced it would be the better of the two new bikes, however the addition of upright bars makes the GSX that much better. You still get similar performance and handling to the R, only with more comfort and flickabilty at low speed, perfect for nipping round town or having fun in the twisties. 

Ride Quality & Brakes 5 out of 5

Much like the R, the suspension on the naked S is well-damped and firm enough to be competent both in town and out in the twisties. We spent an afternoon on the bike exploring nadgery B-roads and it was a pleasure to ride – not once feeling too soft for the rutted countryside. 

There is also plenty of ground clearance to inspire a good degree of lean, which is helped by the aggressively-placed foot pegs, which give the riding position a little added flair. Dressed in grippy Dunlop D102 rubber, it is more than capable of taking the punishment both in the dry and in rainy conditions at faster road-going speeds.

In town, it’s also brilliantly flickable, thanks to its lightweight steering. A 40-degree turning angle either way also means even the tightest of bends can be pulled off with ease.

Coming to a stop, the Bosch ABS system will kick in if you give it a big handful of front brake at low speed, but it is otherwise unobtrusive and ample for a bike of the size. The motor also offers a mild degree of engine braking as you shift down gears, which helps bring you to a standstill fractionally quicker. 

Engine 4 out of 5

Launched at the same time as the fully faired GSX-R125, the naked GSX-S receives the same 124.4cc single-cylinder lump as its sportier brother and offers a similarly linear power delivery all the way to its 11,500rpm redline. 

As well as being punchy, the DOHC motor is also incredibly free revving. Accelerating through the gears, the bike will happily do a speedo-indicated 40mph in second gear, with revs to go and, flat out, the clocks will show an indicated 80mph. It will do all of this while returning an indicated 80+mpg too.  

Throttle response is also good. Coupled with an ultra-light clutch, the bike offers well-balanced, trouble-free slow speed control, which is ideal for learners. Like many low capacity Suzuki’s though, the gearbox can be stubborn when clunking into first and false neutrals can creep in between first and second gear if you’re particularly hand fisted. 

Build Quality & Reliability 4 out of 5

The GSX-S feels like a quality product. Stacked up against its rivals, it looks just as aggressive and just as modern. Much like the faired bike, the conventional forks help drive down cost, but it would be good to see an upside down setup in place for some added bling. 

The front end may not be to everyone’s tastes either - the assembly looks a bit squashed and compact and would really benefit from a larger fly screen to tidy up the area between the lights and clock stay.

Insurance, running costs & value 4 out of 5

Even with the £100 more-expensive GP paint, the GSX-S is still £300 less than the standard KTM 125 Duke and a whole £500 less that Yamaha’s MT-125. This money saved could then go towards a wide-range of genuine accessories, including a colour-matched seat cowl, which really tidies up the back end of the bike. 

Insurance group: 4 of 17 – compare motorcycle insurance quotes now.

Equipment 4 out of 5

As well as a brilliant optional extras catalogue, the GSX-S comes with a unique secure shutter-key lock system, which hides the ignition barrel until the separate receiver next to it has been triggered, using a unique magnetic fob found at the top of the key. 

Facts & Figures

Model info
Year introduced 2017
Year discontinued -
New price £3,699
Used price £2,500 to £4,100
Warranty term Three years
Running costs
Insurance group 4 of 17
Annual road tax £20
Annual service cost £60
Max power 14.8 bhp
Max torque 8.49 ft-lb
Top speed 66 mph
1/4-mile acceleration -
Average fuel consumption 122 mpg
Tank range 296 miles
Engine size 124cc
Engine type Single cylinder DOHC
Frame type Aluminium twin spar
Fuel capacity 11 litres
Seat height 785mm
Bike weight 133kg
Front suspension Non adjustable
Rear suspension Non adjustable
Front brake Single petal disc, ABS
Rear brake Single petal disc, ABS
Front tyre size 90/80-17
Rear tyre size 130/70-17M/C

History & Versions

Model history

2017: Model introduced

Other versions

Faired GSX-R125 launched at the same time

Owners' Reviews

1 owner has reviewed their SUZUKI GSX-S125 (2017-on) and rated it in a number of areas. Read what they have to say and what they like and dislike about the bike below.

Review your SUZUKI GSX-S125 (2017-on)
Summary of Owners' Reviews
Overall Rating 5 out of 5
Ride Quality & Brakes 5 out of 5
Engine 4 out of 5
Build Quality & Reliability 4 out of 5
Value & Running Costs 4 out of 5
Equipment 3 out of 5
5 out of 5

NEW 2018 GSX-S125 GP

05 October 2018 by Michal R

Best features must be the ease of handling and throwing the bike into a tight corner or a nice bend with speed. Especially with the manufactured paired Dunlop tyres it feels just right. Going from left lean to right also feels really natural and no force is required for it to come back up. The GP paint and stickers really make it feel like the track is the machine's home. Looks you just cannot beat in the 125cc range. Dropping down gears engine braking works pretty well, also the clutch biting point is pretty far out. Personally, this is good for me but it can always be adjusted. I had one fault with it, after leaving the bike parked with the parking light enabled from the ignition. The battery was completely killed and needed to be charged. If you leave it overnight expect to be purchasing a new battery. Gears - If you like to quick change from first to Second, the odd neutral really likes to pop up. Always a firm kick up is required just to make sure you won't be revving the engine and going nowhere.

Ride Quality & Brakes
5 out of 5
The Bosch brakes are running perfectly soft and no jittering or any sign of front wheel lock. The ABS does not need to kick in even with slightly heavy braking. Emergency braking is flawless.
4 out of 5
Not much more you can ask of a 125cc 14.4bhp bike can you? From junctions you can pass most cars and these pesky delivery scooters with no problem. High or low revs the bike still performs as it should.
Build Quality & Reliability
4 out of 5
I have had this bike for almost three months now and except from my own fault of leaving the bike with parking lights on for the day there were no reliability issues. I have taken the bike up and over 66mph with no issues.
Value & Running Costs
4 out of 5
I have yet to service the bike as it's brand new. But a standard MOT is all that's needed of the running costs. Fuel however, from 1/4 tank I filled up to full. managed to do 160 miles and then again was left with 1/4 tank to fill up. I'd say every 180/200 miles. All you pay is £15.00 max for fuel.
3 out of 5
There is pretty much no room for any extra equipment or accessories in terms of luggage. Although if you can count the ignition magnet that should protect you from the bike being stolen.
Buying experience

Buying experience was as standard from a dealer. I have the bike on a 3 year finance. £500.00 Deposit plus around £102.00 per month. Brand new it totals up to £4,172.00. As a couple months passed, you can now probably get it for around £3,699.00.

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