BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FLFBS FATBOY 114 1868 18
Model report · 2005–2025

HARLEY-DAVIDSON FLFBS FATBOY 114 1868 18

1868cc Petrol Class 2
90.8%
first-time pass rate
4.3%
failed outright
5,856
median miles at test
954
MOT tests, 2005–2025

Pass rate over time

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

The FLFBS FATBOY 114 1868 18's first-time pass rate has risen 2.4 points since 2021, 91.5% to 93.9%.

87%91%95%2021: 91.5% pass (199 tests)2022: 89.5% pass (209 tests)2023: 88.3% pass (206 tests)2024: 91.4% pass (151 tests)2025: 93.9% pass (163 tests)20212025

What fails on a FLFBS FATBOY 114 1868 18

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
tyres
23 39.7 3.4×
lamps and reflectors
16 27.6 0.9×
Identification of the vehicle
9 15.5 4.1×
brakes
6 10.3 0.2×
structure and attachments
2 3.4 0.3×
steering
1 1.7 0.3×
audible warning (Horn)
1 1.7 0.6×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the FLFBS FATBOY 114 1868 18 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 18.

Pass rate by registration year

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

Best year to buy used: 2018 (91.1% pass). Weakest: 2017 (90.2%).

89%91%92%2017: 90.2% pass (204 tests)2018: 91.1% pass (716 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.

HARLEY-DAVIDSON FLFBS FATBOY 114 1868 18 FAQ

answers computed from the data above · terms in the glossary

Is the HARLEY-DAVIDSON FLFBS FATBOY 114 1868 18 reliable?

The HARLEY-DAVIDSON FLFBS FATBOY 114 1868 18 is more reliable than average for its class: 90.8% of its 954 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #726 of 5426 models.

What does a FLFBS FATBOY 114 1868 18 fail its MOT on most?

tyres — 40% of all defects recorded against failed FLFBS FATBOY 114 1868 18 tests.