YAMAHA YN

49cc Petrol Class 1

#4195 of 5426 overall #310 of 409 YAMAHAs #124 of 455 moped bikes

75.9%

first-time pass rate

15.8%

failed outright

6,292

median miles at test

2,203

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2017–2025

The YN's first-time pass rate has risen 7.2 points since 2017, 68.4% to 75.6%.

Pass rate by mileage

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

A low-mileage YN passes first time 78.1% of the time; by 20k that's 66.7%.

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 YN

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lamps and reflectors	239	27.4	4.3×
brakes	153	17.5	1.1×
tyres	132	15.1	6.6×
suspension	122	14	6.0×
steering	58	6.6	5.6×
structure and attachments	51	5.8	2.8×
tyres and wheels	48	5.5	0.7×
lighting and signalling	35	4	0.3×
steering and suspension	25	2.9	0.3×
Identification of the vehicle	10	1.1	1.8×

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 YN beats 4 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 YN.

Pass rate by registration year

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

Best year to buy used: 2018 (87.7% pass). Weakest: 2014 (71.5%).

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 YN FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA YN reliable?

The YAMAHA YN is more reliable than average for its class: 75.9% of its 2,203 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4195 of 5426 models.

What does a YN fail its MOT on most?

lamps and reflectors — 27% of all defects recorded against failed YN tests.

What is the best year of YN to buy used?

By first-time pass rate, 2018-registered examples do best (87.7%) and 2014 worst (71.5%). Condition and history still trump the year.

How many miles will a YN last?

The median YN shows 6,292 miles at test, and examples around 20k miles still pass 66.7% of the time — mileage alone rarely kills one.