YAMAHA YN50

49cc Petrol Class 1

#4741 of 5426 overall #365 of 409 YAMAHAs #245 of 455 moped bikes

69.9%

first-time pass rate

20.5%

failed outright

6,720

median miles at test

17.9k

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2025

The YN50's first-time pass rate has risen 3.2 points since 2005, 76.3% to 79.5%.

Pass rate by mileage

how the YN50's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage YN50 passes first time 73.4% of the time; by 30k that's 62.7%.

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 YN50

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	3,690	38.2	2.9×
brakes	2,035	21.1	2.0×
steering and suspension	1,423	14.7	1.9×
tyres and wheels	830	8.6	1.9×
fuel and exhaust	642	6.6	4.2×
lamps and reflectors	384	4	0.8×
body and structure	318	3.3	3.2×
reg plates and vin	152	1.6	1.4×
tyres	98	1	0.6×
suspension	91	0.9	0.6×

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 YN50 beats 2 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 YN50.

Pass rate by registration year

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

Best year to buy used: 2012 (87.3% pass). Weakest: 2004 (65.8%).

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 YN50 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA YN50 reliable?

The YAMAHA YN50 is less reliable than average for its class: 69.9% of its 17,935 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4741 of 5426 models.

What does a YN50 fail its MOT on most?

lighting and signalling — 38% of all defects recorded against failed YN50 tests.

What is the best year of YN50 to buy used?

By first-time pass rate, 2012-registered examples do best (87.3%) and 2004 worst (65.8%). Condition and history still trump the year.

How many miles will a YN50 last?

The median YN50 shows 6,720 miles at test, and examples around 30k miles still pass 62.7% of the time — mileage alone rarely kills one.