RIEJU MARATHON 125 (2009 - on) Review

At a glance

Owners' reliability rating: 4 out of 5 (4/5)
Annual servicing cost: £100
Power: 15 bhp
Seat height: Tall (35.4 in / 900 mm)
Weight: Low (258 lbs / 117 kg)


New £3,199
Used N/A

Overall rating

Next up: Ride & brakes
4 out of 5 (4/5)

Rieju’s new Marathon 125 supermoto is powered by the same engine you’ll find in Yamaha’s YZF-R125 and WR125 range, albeit fitted with a 30mm Keihin carb instead of fuel injection. Costing £3199 this Spanish-made machine is actually £400 cheaper than Yamaha’s own WR125X supermoto.

Ride quality & brakes

Next up: Engine
3 out of 5 (3/5)

The seat is unbelievably hard, but on the move it’s light and flickable and it’s a lot of fun. It’s softer than its hardcore looks would suggest and the suspension is on the bouncy side. The brakes lack bite too.


Next up: Reliability
4 out of 5 (4/5)

Powered by a liquid-cooled 125cc four-stroke engine, it has a learner-friendly 15bhp in standard trim, but is available in full-power (20bhp) if you have a full licence. Flat-out, head down, it does 73mph.     

Reliability & build quality

Next up: Value
4 out of 5 (4/5)

Rieju may sound like a dodgy Chinese brand but this is a quality piece of kit, the engine is well finished, the styling bang-on and the quality of standard components high. There are a few cheap and cheerful bits that aren’t quite up to Yamaha standard, like the side stand, which flicks up as soon as you stand the bike up and the tacked-on starter button fitted to the left side of the handlebars. But overall the Rieju is an impressive package. You can also get the Marathon 125 Pro Enduro, which is exactly the same machine, but with bigger wheels and knobbly tyres for exactly the same price.

Value vs rivals

Next up: Equipment
4 out of 5 (4/5)

Three grand is a lot to pay for a 125, but it’s the going rate for these funky learner machines. Honda’s uber-successful £3070 and Yamaha’s own £3699 YZF-R125 continue to sell by the bucket-load, and proves there’s a big market for funky 125s, so there’s no reason why the superb Marathon 125 Pro Supermoto doesn’t deserve a slice of it. Find a 125cc motorcycle for sale.


4 out of 5 (4/5)

The Rieju comes with a high level of standard equipment, like 40mm upside down Marzocchi forks, a wavy Galfer front brake disc, braided steel brake lines, an aluminium swingarm, Domino handlebar grips and a two-way height-adjustable seat. Weighing in wet at just 117kg, it’s a massive 20kg less than the Yamaha WR125X. Compare and buy parts for the Rieju in the MCN Shop.


Engine size 125cc
Engine type Two-stroke single
Frame type Steel double cradle
Fuel capacity 7.4 litres
Seat height 900mm
Bike weight 117kg
Front suspension Non-adjustable
Rear suspension Non-adjustable
Front brake Single 300mm disc
Rear brake 200mm disc
Front tyre size 100/80 17 in
Rear tyre size 130/70 17 in

Mpg, costs & insurance

Average fuel consumption 60 mpg
Annual road tax £24
Annual service cost £100
New price £3,199
Used price -
Insurance group 5 of 17
How much to insure?
Warranty term Two year unlimited mileage

Top speed & performance

Max power 15 bhp
Max torque 15 ft-lb
Top speed 73 mph
1/4 mile acceleration -
Tank range 90 miles

Model history & versions

Model history

2009 – Model introduced

Other versions

Rieju Marathon Pro 125 enduro

Owners' reviews for the RIEJU MARATHON 125 (2009 - on)

2 owners have reviewed their RIEJU MARATHON 125 (2009 - 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 RIEJU MARATHON 125 (2009 - on)

Summary of owners' reviews

Overall rating: 4 out of 5 (4/5)
Ride quality & brakes: 4 out of 5 (4/5)
Engine: 5 out of 5 (5/5)
Reliability & build quality: 4 out of 5 (4/5)
Value vs rivals: 5 out of 5 (5/5)
Equipment: 3.5 out of 5 (3.5/5)
Annual servicing cost: £100
4 out of 5 Great starter bike
19 August 2016 by Farouq Al Sahara

Year: 2011

Annual servicing cost: £100

If not for speedo, it would be a 5

Ride quality & brakes 4 out of 5

Brakes are alright

Engine 5 out of 5

Didn't get any problems with my engines so far

Reliability & build quality 5 out of 5

Quality is definitely there hands down

Value vs rivals 5 out of 5

The thing about supermotos is that, you have endless aftermarket parts

Equipment 4 out of 5

Most of my equipments are aftermarket. Even my exhaust is gpr. Make your rieju your playground. Change it up and it'll be worth it

4 out of 5 the sound
27 May 2011 by kennon

as with the title the noise of this bike is phenominal, the ride is okay be it like sitting on a wooden plank, only downside is not having a warning when your low on fuel or a fuel guage as iv found out already coming up on the side of the road waiting for a jerry can to arrive. cant be going flat out yet as im running her in atm but the Yamaha/minarelli engine is a real peach to work with amazingly good fueling for a carb even in heavy traffic

Ride quality & brakes 4 out of 5
Engine 5 out of 5
Reliability & build quality 3 out of 5
Value vs rivals 5 out of 5
Equipment 3 out of 5
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