Data as of: DVSA MOT results to 2025
Yamaha YB100: MOT pass rate by registration year
Which YB100 years pass first time, and which fall short of the model's 73.2% average, from 2,487 DVSA tests.
Pass rate by registration year
Highest pass rate: 1976 (88.1% of 59 tests). Lowest: 1993 (61.3% of 75). Years more than two points below the model average: 1982, 1986, 1987, 1988, 1989, 1993.
| Registered | Tests | First-time pass | vs model (73.2%) |
|---|---|---|---|
| 1976 | 59 | 88.1% | +14.9 pp |
| 1980 | 83 | 74.7% | +1.5 pp |
| 1981 | 75 | 78.7% | +5.5 pp |
| 1982 | 135 | 70.4% | -2.8 pp |
| 1983 | 115 | 72.2% | -1.0 pp |
| 1984 | 87 | 77.0% | +3.8 pp |
| 1985 | 115 | 75.7% | +2.5 pp |
| 1986 | 96 | 66.7% | -6.5 pp |
| 1987 | 164 | 68.3% | -4.9 pp |
| 1988 | 208 | 65.9% | -7.3 pp |
| 1989 | 282 | 70.2% | -3.0 pp |
| 1990 | 354 | 75.1% | +1.9 pp |
| 1991 | 236 | 72.9% | -0.3 pp |
| 1992 | 123 | 74.8% | +1.6 pp |
| 1993 | 75 | 61.3% | -11.9 pp |
| 1994 | 67 | 80.6% | +7.4 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 YB100 years have the lowest MOT pass rate?
- 1982, 1986, 1987, 1988, 1989, 1993 registered examples pass first time less often than the Yamaha YB100 overall (73.2%); the 1993 cohort is lowest at 61.3% from 75 tests.
- Which YB100 year has the highest MOT pass rate?
- 1976, at 88.1% of 59 first tests (2005–2025). Years more than two points above the model average: 1976, 1981, 1984, 1985, 1994.
- How much does the YB100 pass rate vary by year?
- 26.8 percentage points between the highest (1976, 88.1%) and lowest (1993, 61.3%) 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: Yamaha YB100 reliability, failures and mileage · ranked #4480 of 5428 models· other Yamaha models: YZF-R1, YZF-R6, FZS600, YBR 125, XJR1300, FZ6