SUZUKI AY 50 K4

49cc Petrol Class 1

81.2%

first-time pass rate

16.5%

failed outright

7,604

median miles at test

MOT tests, 2005–2025

What fails on a AY 50 K4

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	12	28.6
steering and suspension	12	28.6
brakes	10	23.8
fuel and exhaust	5	11.9
body and structure	2	4.8
tyres and wheels	1	2.4

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the AY 50 K4 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 AY 50 K4.

Pass rate by registration year

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

Best year to buy used: 2004 (81.9% pass). Weakest: 2004 (81.9%).

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.