AJS ZN

125cc Petrol Class 1

#4546 of 5426 overall #21 of 45 AJSs #303 of 734 commuter bikes

72.4%

first-time pass rate

20.3%

failed outright

4,898

median miles at test

286

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2019–2023

The ZN's first-time pass rate has risen 22.4 points since 2019, 54.3% to 76.7%.

What fails on a ZN

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lamps and reflectors	36	23.7
tyres	32	21.1
brakes	32	21.1
steering	26	17.1
structure and attachments	15	9.9
suspension	7	4.6
wheels	1	0.7
steering and suspension	1	0.7
tyres and wheels	1	0.7
Identification of the vehicle	1	0.7

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 ZN beats 3 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

YAMAHA YBR 125 71.0% pass · 125k tests HONDA CG125 72.2% pass · 89.3k tests HONDA CBF125 73.3% pass · 84.4k tests GILERA RUNNER 70.8% pass · 69.9k 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 ZN.

Pass rate by registration year

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

Best year to buy used: 2017 (77.4% pass). Weakest: 2016 (69.9%).

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.