BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FLFBS FATBOY 114 1868 20
Model report · 2005–2025

HARLEY-DAVIDSON FLFBS FATBOY 114 1868 20

1868cc Petrol Class 2
91.5%
first-time pass rate
3.9%
failed outright
4,081
median miles at test
305
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2023–2025

The FLFBS FATBOY 114 1868 20's first-time pass rate has risen 9.8 points since 2023, 86.2% to 96.0%.

84%91%98%2023: 86.2% pass (109 tests)2024: 91.7% pass (84 tests)2025: 96.0% pass (101 tests)20232025

What fails on a FLFBS FATBOY 114 1868 20

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
tyres
11 55
Identification of the vehicle
4 20
lamps and reflectors
4 20
structure and attachments
1 5

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 FLFBS FATBOY 114 1868 20 beats 4 of its 4 closest rivals (HARLEY-DAVIDSON FLSTF, HARLEY-DAVIDSON FLSTC, TRIUMPH ROCKET III).

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 FLFBS FATBOY 114 1868 20.

Pass rate by registration year

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

Best year to buy used: 2020 (91.5% pass). Weakest: 2019 (89.7%).

89%91%92%2019: 89.7% pass (58 tests)2020: 91.5% pass (224 tests)20192020

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.