BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FLFB FATBOY 1745 19
Model report · 2005–2025

HARLEY-DAVIDSON FLFB FATBOY 1745 19

1745cc Petrol Class 2
92.2%
first-time pass rate
2.3%
failed outright
4,100
median miles at test
129
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2022–2025

The FLFB FATBOY 1745 19's first-time pass rate has held steady since 2022 (93.9% → 93.3%).

85%91%96%2022: 93.9% pass (33 tests)2023: 94.1% pass (34 tests)2024: 87.1% pass (31 tests)2025: 93.3% pass (30 tests)20222025

What fails on a FLFB FATBOY 1745 19

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lamps and reflectors
3 42.9
tyres
2 28.6
Identification of the vehicle
1 14.3
steering
1 14.3

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 FLFB FATBOY 1745 19 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 FLFB FATBOY 1745 19.

Pass rate by registration year

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

Best year to buy used: 2019 (93.4% pass). Weakest: 2019 (93.4%).

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.