Buell XB12X: MOT pass rate by registration year

Which XB12X years pass first time, and which fall short of the model's 85.1% average, from 510 DVSA tests.

2007

highest-passing year · 88.6%

2006

lowest-passing year · 78.4%

10.2pp

spread across 3 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: 2007 (88.6% of 202 tests). Lowest: 2006 (78.4% of 125). Years more than two points below the model average: 2005, 2006.

Registered	Tests	First-time pass	vs model (85.1%)
2005	104	80.8%	-4.3 pp
2006	125	78.4%	-6.7 pp
2007	202	88.6%	+3.5 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 · 2010–2017

Questions

Which XB12X years have the lowest MOT pass rate?: 2005, 2006 registered examples pass first time less often than the Buell XB12X overall (85.1%); the 2006 cohort is lowest at 78.4% from 125 tests.
Which XB12X year has the highest MOT pass rate?: 2007, at 88.6% of 202 first tests (2005–2025).
How much does the XB12X pass rate vary by year?: 10.2 percentage points between the highest (2007, 88.6%) and lowest (2006, 78.4%) 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: Buell XB12X reliability, failures and mileage · ranked #2469 of 5428 models· other Buell models: XB12S, S1, M2, XB12R, XB9R, X1