HARLEY-DAVIDSON FLSTFBS FATBOY S 1801 17

1801cc Petrol Class 2

91.7%

first-time pass rate

2.4%

failed outright

8,108

median miles at test

MOT tests, 2005–2025

What fails on a FLSTFBS FATBOY S 1801 17

failure defects by component group · advisories excluded

Component group	Share of defects	Defects	% of defects
Identification of the vehicle		1	50
lamps and reflectors		1	50

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 FLSTFBS FATBOY S 1801 17 beats 4 of its 4 closest rivals (HARLEY-DAVIDSON FLSTF, HARLEY-DAVIDSON FLSTC, TRIUMPH ROCKET III).

HARLEY-DAVIDSON FLSTF 88.9% pass · 30.1k tests HARLEY-DAVIDSON FLSTC 89.4% pass · 23.7k tests TRIUMPH ROCKET III 88.3% pass · 15.5k tests HARLEY-DAVIDSON FXDWG 88.7% pass · 14.6k tests

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 FLSTFBS FATBOY S 1801 17.

Pass rate by registration year

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

Best year to buy used: 2016 (90.8% pass). Weakest: 2016 (90.8%).

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.