Harley-Davidson XL 1200 N Nightster: MOT pass rate by registration year

Which XL 1200 N Nightster years pass first time, and which fall short of the model's 86.9% average, from 2,753 DVSA tests.

2007

highest-passing year · 88.3%

2008

lowest-passing year · 86.3%

2.0pp

spread across 4 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 (88.3% of 513 tests). Lowest: 2008 (86.3% of 949).

Registered	Tests	First-time pass	vs model (86.9%)
2007	513	88.3%	+1.4 pp
2008	949	86.3%	-0.6 pp
2009	810	86.9%	+0.0 pp
2010	451	86.7%	-0.2 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 · 2010–2025

Questions

Which XL 1200 N Nightster years have the lowest MOT pass rate?: none: no registration year of the Harley-Davidson XL 1200 N Nightster falls more than two points under the model's 86.9% overall pass rate.
Which XL 1200 N Nightster year has the highest MOT pass rate?: 2007, at 88.3% of 513 first tests (2005–2025).
How much does the XL 1200 N Nightster pass rate vary by year?: 2.0 percentage points between the highest (2007, 88.3%) and lowest (2008, 86.3%) 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: Harley-Davidson XL 1200 N Nightster reliability, failures and mileage · ranked #1937 of 5428 models· other Harley-Davidson models: XLH 883, Flstf, Flstc, XL, XL1200C, XL883