Data as of: DVSA MOT results to 2025
Norton Triton: MOT pass rate by registration year
Which Triton years pass first time, and which fall short of the model's 92.1% average, from 1,496 DVSA tests.
Pass rate by registration year
Highest pass rate: 1959 (96.4% of 197 tests). Lowest: 1971 (88.3% of 145). Years more than two points below the model average: 1957, 1960, 1971.
| Registered | Tests | First-time pass | vs model (92.1%) |
|---|---|---|---|
| 1957 | 96 | 89.6% | -2.5 pp |
| 1958 | 111 | 91.0% | -1.1 pp |
| 1959 | 197 | 96.4% | +4.3 pp |
| 1960 | 333 | 89.8% | -2.3 pp |
| 1961 | 89 | 93.3% | +1.2 pp |
| 1962 | 80 | 91.3% | -0.8 pp |
| 1971 | 145 | 88.3% | -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
Questions
- Which Triton years have the lowest MOT pass rate?
- 1957, 1960, 1971 registered examples pass first time less often than the Norton Triton overall (92.1%); the 1971 cohort is lowest at 88.3% from 145 tests.
- Which Triton year has the highest MOT pass rate?
- 1959, at 96.4% of 197 first tests (2005–2025).
- How much does the Triton pass rate vary by year?
- 8.1 percentage points between the highest (1959, 96.4%) and lowest (1971, 88.3%) 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: Norton Triton reliability, failures and mileage · ranked #455 of 5428 models· other Norton models: Commando, Dominator, ES2, Commander, Atlas, 650SS