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

Data as of: DVSA MOT results to 2025

Ajs JS: MOT pass rate by registration year

Which JS years pass first time, and which fall short of the model's 71.2% average, from 674 DVSA tests.

2015
highest-passing year · 75.0%
2013
lowest-passing year · 66.7%
8.3pp
spread across 3 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: 2015 (75.0% of 160 tests). Lowest: 2013 (66.7% of 81). Years more than two points below the model average: 2013.

65%71%77%2013: 66.7% pass (81 tests)2014: 71.6% pass (310 tests)2015: 75.0% pass (160 tests)201320142015
RegisteredTestsFirst-time passvs model (71.2%)
2013 81 66.7% -4.5 pp
2014 310 71.6% +0.4 pp
2015 160 75.0% +3.8 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
56%70%84%2017: 67.3% pass (98 tests)2018: 68.0% pass (100 tests)2019: 73.3% pass (90 tests)2020: 64.5% pass (62 tests)2021: 79.1% pass (86 tests)2022: 78.9% pass (76 tests)2023: 60.6% pass (66 tests)2024: 76.5% pass (34 tests)2025: 79.5% pass (39 tests)20172025

Questions

Which JS years have the lowest MOT pass rate?
2013 registered examples pass first time less often than the Ajs JS overall (71.2%); the 2013 cohort is lowest at 66.7% from 81 tests.
Which JS year has the highest MOT pass rate?
2015, at 75.0% of 160 first tests (2005–2025).
How much does the JS pass rate vary by year?
8.3 percentage points between the highest (2015, 75.0%) and lowest (2013, 66.7%) 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 JS reliability, failures and mileage · ranked #4640 of 5428 models· other Ajs models: Modena, Modena 125, DD, Firefox, DD 125 E 08, 16MS