AJS 20

500cc Petrol Class 2

#182 of 5426 overall #3 of 45 AJSs #110 of 2787 other bikes

93.9%

first-time pass rate

0.8%

failed outright

13,470

median miles at test

247

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2010

The 20's first-time pass rate has fallen 7.1 points since 2006, 97.1% to 90.0%.

how the 20's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage 20 passes first time 94.6% of the time; by 20k that's 87.9%.

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
brakes	2	40
fuel and exhaust	1	20
lighting and signalling	1	20
steering and suspension	1	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 20 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 20.