Data as of: DVSA MOT results to 2025
Yamaha QT50: MOT pass rate by registration year
Which QT50 years pass first time, and which fall short of the model's 82.0% average, from 1,119 DVSA tests.
Pass rate by registration year
Highest pass rate: 1991 (89.6% of 134 tests). Lowest: 1987 (73.6% of 121). Years more than two points below the model average: 1987, 1989, 1993.
| Registered | Tests | First-time pass | vs model (82.0%) |
|---|---|---|---|
| 1982 | 138 | 86.2% | +4.2 pp |
| 1986 | 155 | 81.9% | -0.1 pp |
| 1987 | 121 | 73.6% | -8.4 pp |
| 1989 | 93 | 77.4% | -4.6 pp |
| 1990 | 167 | 84.4% | +2.4 pp |
| 1991 | 134 | 89.6% | +7.6 pp |
| 1992 | 114 | 80.7% | -1.3 pp |
| 1993 | 77 | 79.2% | -2.8 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 QT50 years have the lowest MOT pass rate?
- 1987, 1989, 1993 registered examples pass first time less often than the Yamaha QT50 overall (82.0%); the 1987 cohort is lowest at 73.6% from 121 tests.
- Which QT50 year has the highest MOT pass rate?
- 1991, at 89.6% of 134 first tests (2005–2025). Years more than two points above the model average: 1982, 1990, 1991.
- How much does the QT50 pass rate vary by year?
- 16.0 percentage points between the highest (1991, 89.6%) and lowest (1987, 73.6%) 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 QT50 reliability, failures and mileage · ranked #3181 of 5428 models· other Yamaha models: YZF-R1, YZF-R6, FZS600, YBR 125, XJR1300, FZ6