AJS 18

500cc Petrol Class 2

#67 of 5426 overall #1 of 45 AJSs #43 of 2787 other bikes

95.1%

first-time pass rate

1.9%

failed outright

16,601

median miles at test

308

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2012

The 18's first-time pass rate has fallen 6.5 points since 2006, 100.0% to 93.5%.

how the 18's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage 18 passes first time 93.1% of the time; by 50k that's 100.0%.

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.

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	3	30
tyres and wheels	3	30
brakes	2	20
steering and suspension	2	20

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

same type, similar capacity, high test volume

On first-time pass rate the 18 beats 4 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).

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 18.