YAMAHA NS

49cc Petrol Class 1

#4769 of 5426 overall #370 of 409 YAMAHAs #252 of 455 moped bikes

69.5%

first-time pass rate

20.4%

failed outright

10,013

median miles at test

3,337

MOT tests, 2005–2025

Pass rate over time

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

The NS's first-time pass rate has fallen 1.2 points since 2017, 68.1% to 66.9%.

Pass rate by mileage

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

A low-mileage NS passes first time 75.9% of the time; by 20k that's 62.0%.

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 NS

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lamps and reflectors	761	42	7.5×
brakes	451	24.9	2.3×
tyres	135	7.4	5.6×
structure and attachments	122	6.7	4.3×
steering	108	6	7.2×
suspension	105	5.8	3.8×
Identification of the vehicle	42	2.3	5.1×
lighting and signalling	40	2.2	0.2×
audible warning (Horn)	28	1.5	4.6×
steering and suspension	22	1.2	0.2×

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 NS 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 NS.

Pass rate by registration year

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

Best year to buy used: 2017 (75.0% pass). Weakest: 2014 (62.6%).

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 NS FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA NS reliable?

The YAMAHA NS is less reliable than average for its class: 69.5% of its 3,337 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4769 of 5426 models.

What does a NS fail its MOT on most?

lamps and reflectors — 42% of all defects recorded against failed NS tests.

What is the best year of NS to buy used?

By first-time pass rate, 2017-registered examples do best (75.0%) and 2014 worst (62.6%). Condition and history still trump the year.

How many miles will a NS last?

The median NS shows 10,013 miles at test, and examples around 20k miles still pass 62.0% of the time — mileage alone rarely kills one.