MZ SX125 (2002 - 2005) Review

At a glance

Power: 15 bhp
Seat height: Low (5.0 in / 127 mm)
Weight: Low (280 lbs / 127 kg)

Overall rating

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

It's like Skoda cars; once you get your head around the concept of riding an MZ, you'll probably realise how good they can be. The MZ SX125 has a gutsy little 15bhp motor, a lanky lad sized chassis and decent off-road ability if you fancy it. Bit expensive compared to Far Eastern 125s, but well made.

Ride quality & brakes

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

Whether in Supermoto or SX guise, the MZ has the same chassis, with longĀ  40mm forks and an adjustable monoshock at the rear end. It handles urban commuting and occasional off-roading very well, but the OE tyres are reportedly not so brilliant.


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

The MZ SX125's four stroke 125cc motor was designed and built by MZ themselves and offers a meaty 14bhp, which is enough to make a genuine 60-65mph cruising speed a reality. Many four stroke 125s cannot match that ability in the real world. The 6 speed gearbox is a bit clunky, otherwise it's a solid power unit.

Reliability & build quality

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

OK, the MZ125 was never a cheap bike, but you get a well made machine, with an excellent reliability record and a two year warranty for your money. When your mates are sitting at home Googling for mythical spares for that `internet bargain' 125, you'll be off down the 8 til Late shop on your SM125.

Value vs rivals

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

All 125 machines are expensive brand new, but the upside is that resale values are fairly strong - the demand from trade and punters alike for a decent used 125 trailbike is huge. The MZ may lack a fashionable tank badge, but it does a great job. The SM version is still in production. Find an MZ SX125 for sale.


4 out of 5 (4/5)

Mirrors that work! How thorough of the Germans to consider fitting details like a grabrail, wide mirrors and a decent 12.5 litre gas tank to the little MZ SX125. Braided steel brake lines, electric starter too. The only downside is the seat, which is plank-like, in both SX and SM models.


Engine size 124cc
Engine type 4v, single, 6 gears
Frame type Steel tubular
Fuel capacity 13 litres
Seat height 127mm
Bike weight 127kg
Front suspension None
Rear suspension Preload
Front brake 280mm disc
Rear brake 220mm disc
Front tyre size 110/70 x 17 in
Rear tyre size 130/70 x 17 in

Mpg, costs & insurance

Average fuel consumption 80 mpg
Annual road tax £22
Annual service cost -
New price -
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 -
Top speed 70 mph
1/4 mile acceleration 19 secs
Tank range 210 miles

Model history & versions

Model history

2002: MZ SX125 and SM125 models launched.
2005: MZ SM125 Cup model appears - Supermoto race series paint job.
2005: MZ SX125 discontinued.

Other versions

MZ SM125: Similar design, but Supermoto wheels/tyres. 

Owners' reviews for the MZ SX125 (2002 - 2005)

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