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WK Bikes SM50 Moped Motorbike Review

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MCN overall verdict rating is 4

Here’s a bike to make any 16-year-old’s visor steam up: the 500 cc supermoto-styled SM50, made in Taiwan and exclusively branded ‘WK’ in the UK. WK has been set-up by the same UK company who are behind Quadzilla Quads, who’ve been in the learner-legal quad market for over 10 years.


MCN rating rating is 4
Owners' rating rating is 0

With a liquid-cooled, 49cc two-stroke single cylinder engine, learner-friendly bikes will be restricted to 2.9bhp and 30mph, but a £60 de-restriction kit is available, which includes different sprockets, carb jets and exhaust gaskets, to unleash 3.6bhp and 65mph.

Ride and Handling

MCN rating rating is 4
Owners' rating rating is 0

The SM50’s taut suspension barely moves under your weight and you sit high in an aggressive ‘elbows-out’ stance. Shorter riders will struggle to get their feet flat on the floor. The chassis is stable and sure-footed enough for the SM50 to fly through most corners without breaking into a sweat or indeed braking. Dry weight is just 95kg, so it’s light and agile and the brakes have decent power, although not enough for proper supermoto-style rolling stoppies.


MCN rating rating is 4
Owners' rating rating is 0

The SM50 features aggressive supermoto bodywork, spoked wheels, a funky stainless steel underslung exhaust, blue-anodised Renthal-style aluminium handlebars, wavy brake discs, a digital dash, polished aluminium swingarm, aluminium brake and gear levers and electric start.

WK SM50 (2011-current)

Detail Value
New price £2,099
Engine size 49 cc
Power 3 bhp
Top speed 30 mph
  MCN ratings Owners' ratings
Overall rating is 4 rating is 0
Engine rating is 4 rating is 0
Ride & Handling rating is 4 rating is 0
Equipment rating is 4 rating is 0
Quality & Reliability rating is 0 rating is 0
Value rating is 4 rating is 0

Quality and Reliability

MCN rating rating is 0
Owners' rating rating is 0

The WK SM50 comes with a 12-month unlimited mileage parts and labour warranty. It’s well built, good fun and deserves to be taken seriously, but only time will tell how durable and reliable it is in the hands of a 16-year-old.


MCN rating rating is 4
Owners' rating rating is 0

Well-equipped and is sold with a comprehensive 12 month warranty, the SM50 is priced keenly for a supermoto-style 50 - cheaper than more established European rivals from Aprilia and Derbi, but on par with the Spanish Rieju.


Insurance group: n/a

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Model History

Model introduced in 2011

Other Versions


Top speed 30 mph
1/4-mile acceleration secs
Max power 3 bhp
Max torque ft-lb
Weight 96 kg
Seat height mm
Fuel capacity litres
Average fuel consumption mpg
Tank range miles
Annual road tax
Insurance group of 17
Engine size 49 cc
Engine specification
Frame Steel cradle
Front suspension adjustment Non-adjustable telescopic forks
Rear suspension adjustment Single rear shock, adjustable for preload
Front brakes Single 300mm disc with twin-piston radial caliper
Rear brake 160mm drum
Front tyre size
Rear tyre size

Owners' Overall Rating rating is 0(0 reviews)

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