BIKERELIABILITY Reg check
Registration-year report · 2005–2025

Data as of: DVSA MOT results to 2025

Triumph Bonneville Bobber: MOT pass rate by registration year

Which Bonneville Bobber years pass first time, and which fall short of the model's 88.8% average, from 706 DVSA tests.

2017
highest-passing year · 93.5%
2022
lowest-passing year · 84.9%
8.6pp
spread across 4 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: 2017 (93.5% of 92 tests). Lowest: 2022 (84.9% of 251). Years more than two points below the model average: 2022.

83%89%95%2016: 89.5% pass (57 tests)2017: 93.5% pass (92 tests)2021: 90.7% pass (301 tests)2022: 84.9% pass (251 tests)201620212022
RegisteredTestsFirst-time passvs model (88.8%)
2016 57 89.5% +0.7 pp
2017 92 93.5% +4.7 pp
2021 301 90.7% +1.9 pp
2022 251 84.9% -3.9 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 · 2024–2025
87%89%91%2024: 90.4% pass (166 tests)2025: 87.9% pass (429 tests)20242025

Questions

Which Bonneville Bobber years have the lowest MOT pass rate?
2022 registered examples pass first time less often than the Triumph Bonneville Bobber overall (88.8%); the 2022 cohort is lowest at 84.9% from 251 tests.
Which Bonneville Bobber year has the highest MOT pass rate?
2017, at 93.5% of 92 first tests (2005–2025).
How much does the Bonneville Bobber pass rate vary by year?
8.6 percentage points between the highest (2017, 93.5%) and lowest (2022, 84.9%) 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: Triumph Bonneville Bobber reliability, failures and mileage · ranked #1332 of 5428 models· other Triumph models: Bonneville, Tiger, Sprint, Daytona, Speed Triple, Thunderbird