BIKERELIABILITY Reg check
League table/ AJS/ DD/By year
Registration-year report · 2005–2025

Data as of: DVSA MOT results to 2025

Ajs DD: MOT pass rate by registration year

Which DD years pass first time, and which fall short of the model's 68.4% average, from 1,798 DVSA tests.

2012
highest-passing year · 78.8%
2014
lowest-passing year · 63.2%
15.6pp
spread across 7 years

Pass rate by registration year

first-time pass rate · cohorts with 50 or more tests · registration year from first use date

Highest pass rate: 2012 (78.8% of 99 tests). Lowest: 2014 (63.2% of 448). Years more than two points below the model average: 2014, 2016.

60%71%82%2010: 73.4% pass (64 tests)2012: 78.8% pass (99 tests)2013: 67.6% pass (108 tests)2014: 63.2% pass (448 tests)2015: 71.5% pass (453 tests)2016: 64.4% pass (365 tests)2017: 77.4% pass (106 tests)201020142017
RegisteredTestsFirst-time passvs model (68.4%)
2010 64 73.4% +5.0 pp
2012 99 78.8% +10.4 pp
2013 108 67.6% -0.8 pp
2014 448 63.2% -5.2 pp
2015 453 71.5% +3.1 pp
2016 365 64.4% -4.0 pp
2017 106 77.4% +9.0 pp

Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years. A first-time MOT pass is a roadworthiness check, not a full mechanical inspection.

Pass rate over time

first-time pass rate by test year · 2017–2025
62%69%75%2017: 71.8% pass (149 tests)2018: 67.8% pass (202 tests)2019: 68.4% pass (247 tests)2020: 69.5% pass (233 tests)2021: 65.4% pass (272 tests)2022: 69.1% pass (236 tests)2023: 64.6% pass (189 tests)2024: 73.1% pass (119 tests)2025: 69.1% pass (123 tests)20172025

Questions

Which DD years have the lowest MOT pass rate?
2014, 2016 registered examples pass first time less often than the Ajs DD overall (68.4%); the 2014 cohort is lowest at 63.2% from 448 tests.
Which DD year has the highest MOT pass rate?
2012, at 78.8% of 99 first tests (2005–2025). Years more than two points above the model average: 2010, 2012, 2015, 2017.
How much does the DD pass rate vary by year?
15.6 percentage points between the highest (2012, 78.8%) and lowest (2014, 63.2%) cohorts with at least 50 tests. Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

Full report: Ajs DD reliability, failures and mileage · ranked #4831 of 5428 models· other Ajs models: Modena, Modena 125, Firefox, DD 125 E 08, 16MS, Cadwell