YAMAHA YH 50

49cc Petrol Class 1

#4406 of 5426 overall #331 of 409 YAMAHAs #157 of 455 moped bikes

73.9%

first-time pass rate

18.1%

failed outright

7,324

median miles at test

2,505

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2023

The YH 50's first-time pass rate has fallen 7.3 points since 2005, 84.0% to 76.7%.

Pass rate by mileage

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

A low-mileage YH 50 passes first time 76.8% of the time; by 20k that's 70.1%.

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 YH 50

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	408	34.2	2.4×
steering and suspension	315	26.4	2.9×
brakes	182	15.3	1.3×
tyres and wheels	95	8	1.5×
fuel and exhaust	79	6.6	3.7×
body and structure	40	3.4	3.0×
lamps and reflectors	29	2.4	0.4×
suspension	21	1.8	0.9×
reg plates and vin	14	1.2	0.8×
tyres	9	0.8	0.4×

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 YH 50 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 YH 50.

Pass rate by registration year

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

Best year to buy used: 2007 (84.3% pass). Weakest: 2001 (69.1%).

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 YH 50 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA YH 50 reliable?

The YAMAHA YH 50 is about average for its class: 73.9% of its 2,505 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4406 of 5426 models.

What does a YH 50 fail its MOT on most?

lighting and signalling — 34% of all defects recorded against failed YH 50 tests.

What is the best year of YH 50 to buy used?

By first-time pass rate, 2007-registered examples do best (84.3%) and 2001 worst (69.1%). Condition and history still trump the year.

How many miles will a YH 50 last?

The median YH 50 shows 7,324 miles at test, and examples around 20k miles still pass 70.1% of the time — mileage alone rarely kills one.