YAMAHA CW 50 NG

49cc Petrol Class 1

#5006 of 5426 overall #392 of 409 YAMAHAs #324 of 455 moped bikes

65.2%

first-time pass rate

26.9%

failed outright

8,134

median miles at test

871

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2013

The CW 50 NG's first-time pass rate has risen 2.5 points since 2005, 66.7% to 69.2%.

Pass rate by mileage

how the CW 50 NG's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage CW 50 NG passes first time 67.6% of the time; by 20k that's 48.4%.

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a CW 50 NG

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	298	41.5	4.4×
steering and suspension	196	27.3	4.9×
brakes	113	15.7	2.2×
tyres and wheels	33	4.6	1.8×
fuel and exhaust	28	3.9	3.6×
lamps and reflectors	16	2.2	0.5×
body and structure	11	1.5	2.4×
reg plates and vin	9	1.3	1.8×
Items Not Tested	8	1.1	8.7×
suspension	6	0.8	0.8×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the CW 50 NG beats 0 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

PEUGEOT SPEEDFIGHT 65.2% pass · 83.7k tests PIAGGIO ZIP 71.3% pass · 79.0k tests PIAGGIO NRG 65.5% pass · 40.5k tests PEUGEOT VIVACITY 70.4% pass · 29.7k tests

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the CW 50 NG.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2005 (72.5% pass). Weakest: 2000 (60.8%).

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

YAMAHA CW 50 NG FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA CW 50 NG reliable?

The YAMAHA CW 50 NG is less reliable than average for its class: 65.2% of its 871 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5006 of 5426 models.

What does a CW 50 NG fail its MOT on most?

lighting and signalling — 42% of all defects recorded against failed CW 50 NG tests.

What is the best year of CW 50 NG to buy used?

By first-time pass rate, 2005-registered examples do best (72.5%) and 2000 worst (60.8%). Condition and history still trump the year.

How many miles will a CW 50 NG last?

The median CW 50 NG shows 8,134 miles at test, and examples around 20k miles still pass 48.4% of the time — mileage alone rarely kills one.