BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FLHC HERITAGE STC 1745 18
Model report · 2005–2025

HARLEY-DAVIDSON FLHC HERITAGE STC 1745 18

1745cc Petrol Class 2
95.5%
first-time pass rate
1.8%
failed outright
8,128
median miles at test
220
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2021–2025

The FLHC HERITAGE STC 1745 18's first-time pass rate has held steady since 2021 (97.7% → 97.6%).

87%93%100%2021: 97.7% pass (44 tests)2022: 89.1% pass (46 tests)2023: 95.8% pass (48 tests)2024: 96.9% pass (32 tests)2025: 97.6% pass (42 tests)20212025

Pass rate by mileage

how the FLHC HERITAGE STC 1745 18's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage FLHC HERITAGE STC 1745 18 passes first time 96.9% of the time; by 20k that's 90.0%.

88%94%99%0k: 96.9% pass (128 tests)10k: 97.8% pass (45 tests)20k: 90.0% pass (30 tests)0k10k20k

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a FLHC HERITAGE STC 1745 18

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
tyres
2 50
brakes
1 25
lamps and reflectors
1 25

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the FLHC HERITAGE STC 1745 18 beats 4 of its 4 closest rivals (HARLEY-DAVIDSON FLSTF, HARLEY-DAVIDSON FLSTC, HARLEY-DAVIDSON FXDWG).

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the FLHC HERITAGE STC 1745 18.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2017 (97.1% pass). Weakest: 2018 (94.9%).

94%96%98%2017: 97.1% pass (70 tests)2018: 94.9% pass (137 tests)20172018

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.