Data as of: DVSA MOT results to 2025
Yamaha DT: MOT pass rate by registration year
Which DT years pass first time, and which fall short of the model's 70.8% average, from 1,442 DVSA tests.
Pass rate by registration year
Highest pass rate: 1978 (91.7% of 72 tests). Lowest: 1990 (58.4% of 101). Years more than two points below the model average: 1980, 1985, 1990, 1991, 1992.
| Registered | Tests | First-time pass | vs model (70.8%) |
|---|---|---|---|
| 1977 | 65 | 83.1% | +12.3 pp |
| 1978 | 72 | 91.7% | +20.9 pp |
| 1979 | 75 | 85.3% | +14.5 pp |
| 1980 | 77 | 67.5% | -3.3 pp |
| 1981 | 107 | 79.4% | +8.6 pp |
| 1985 | 51 | 68.6% | -2.2 pp |
| 1987 | 78 | 76.9% | +6.1 pp |
| 1988 | 57 | 82.5% | +11.7 pp |
| 1989 | 71 | 69.0% | -1.8 pp |
| 1990 | 101 | 58.4% | -12.4 pp |
| 1991 | 89 | 68.5% | -2.3 pp |
| 1992 | 81 | 64.2% | -6.6 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 DT years have the lowest MOT pass rate?
- 1980, 1985, 1990, 1991, 1992 registered examples pass first time less often than the Yamaha DT overall (70.8%); the 1990 cohort is lowest at 58.4% from 101 tests.
- Which DT year has the highest MOT pass rate?
- 1978, at 91.7% of 72 first tests (2005–2025). Years more than two points above the model average: 1977, 1978, 1979, 1981, 1987, 1988.
- How much does the DT pass rate vary by year?
- 33.3 percentage points between the highest (1978, 91.7%) and lowest (1990, 58.4%) 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: Yamaha DT reliability, failures and mileage · ranked #4675 of 5428 models· other Yamaha models: YZF-R1, YZF-R6, FZS600, YBR 125, XJR1300, FZ6