AJS DD 125 E

125cc Petrol Class 1

#5136 of 5426 overall #38 of 45 AJSs #583 of 734 commuter bikes

62.2%

first-time pass rate

23.7%

failed outright

8,162

median miles at test

1,189

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2009–2022

The DD 125 E's first-time pass rate has fallen 10.9 points since 2009, 62.3% to 51.4%.

Pass rate by mileage

how the DD 125 E's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage DD 125 E passes first time 69.1% of the time; by 20k that's 48.9%.

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.

What fails on a DD 125 E

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	269	28.1	3.0×
brakes	147	15.4	1.9×
steering and suspension	141	14.7	2.6×
lamps and reflectors	105	11	2.2×
tyres and wheels	89	9.3	2.5×
drive system	73	7.6	6.9×
structure and attachments	60	6.3	3.3×
body and structure	31	3.2	3.9×
suspension	26	2.7	1.8×
steering	16	1.7	2.2×

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 DD 125 E beats 0 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 DD 125 E.

Pass rate by registration year

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

Best year to buy used: 2010 (70.2% pass). Weakest: 2008 (58.2%).

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.

AJS DD 125 E FAQ

answers computed from the data above · terms in the glossary

Is the AJS DD 125 E reliable?

The AJS DD 125 E is less reliable than average for its class: 62.2% of its 1,189 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5136 of 5426 models.

What does a DD 125 E fail its MOT on most?

lighting and signalling — 28% of all defects recorded against failed DD 125 E tests.

What is the best year of DD 125 E to buy used?

By first-time pass rate, 2010-registered examples do best (70.2%) and 2008 worst (58.2%). Condition and history still trump the year.

How many miles will a DD 125 E last?

The median DD 125 E shows 8,162 miles at test, and examples around 20k miles still pass 48.9% of the time — mileage alone rarely kills one.