Harley-Davidson Flstc Heritage STC 1690: MOT pass rate by registration year

Which Flstc Heritage STC 1690 years pass first time, and which fall short of the model's 92.1% average, from 694 DVSA tests.

2013

highest-passing year · 96.9%

2012

lowest-passing year · 90.8%

6.1pp

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: 2013 (96.9% of 65 tests). Lowest: 2012 (90.8% of 468).

Registered	Tests	First-time pass	vs model (92.1%)
2011	152	94.1%	+2.0 pp
2012	468	90.8%	-1.3 pp
2013	65	96.9%	+4.8 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 · 2015–2025

Questions

Which Flstc Heritage STC 1690 years have the lowest MOT pass rate?: none: no registration year of the Harley-Davidson Flstc Heritage STC 1690 falls more than two points under the model's 92.1% overall pass rate.
Which Flstc Heritage STC 1690 year has the highest MOT pass rate?: 2013, at 96.9% of 65 first tests (2005–2025).
How much does the Flstc Heritage STC 1690 pass rate vary by year?: 6.1 percentage points between the highest (2013, 96.9%) and lowest (2012, 90.8%) 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 Flstc Heritage STC 1690 reliability, failures and mileage · ranked #455 of 5428 models· other Harley-Davidson models: XLH 883, Flstf, Flstc, XL, XL1200C, XL883