Yamaha TZR: MOT pass rate by registration year

Which TZR years pass first time, and which fall short of the model's 70.1% average, from 1,067 DVSA tests.

1992

highest-passing year · 77.9%

1988

lowest-passing year · 68.2%

9.7pp

spread across 6 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: 1992 (77.9% of 122 tests). Lowest: 1988 (68.2% of 107).

Registered	Tests	First-time pass	vs model (70.1%)
1987	67	74.6%	+4.5 pp
1988	107	68.2%	-1.9 pp
1989	177	74.6%	+4.5 pp
1990	221	70.6%	+0.5 pp
1991	110	70.0%	-0.1 pp
1992	122	77.9%	+7.8 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

first-time pass rate by test year · 2006–2025

Questions

Which TZR years have the lowest MOT pass rate?: none: no registration year of the Yamaha TZR falls more than two points under the model's 70.1% overall pass rate.
Which TZR year has the highest MOT pass rate?: 1992, at 77.9% of 122 first tests (2005–2025). Years more than two points above the model average: 1987, 1989, 1992.
How much does the TZR pass rate vary by year?: 9.7 percentage points between the highest (1992, 77.9%) and lowest (1988, 68.2%) 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 TZR reliability, failures and mileage · ranked #4731 of 5428 models· other Yamaha models: YZF-R1, YZF-R6, FZS600, YBR 125, XJR1300, FZ6