HARLEY-DAVIDSON FLSTFB FATBOY SP 1584 11

1585cc Petrol Class 2

#1818 of 5426 overall #311 of 397 HARLEY-DAVIDSONs #364 of 465 cruiser bikes

87.3%

first-time pass rate

5.5%

failed outright

10,316

median miles at test

361

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2014–2023

The FLSTFB FATBOY SP 1584 11's first-time pass rate has fallen 2.1 points since 2014, 92.7% to 90.6%.

Pass rate by mileage

how the FLSTFB FATBOY SP 1584 11's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage FLSTFB FATBOY SP 1584 11 passes first time 84.5% of the time; by 20k that's 90.3%.

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 FLSTFB FATBOY SP 1584 11

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	9	23.7
lamps and reflectors	8	21.1
brakes	8	21.1
tyres and wheels	5	13.2
reg plates and vin	2	5.3
Identification of the vehicle	2	5.3
driving controls	1	2.6
audible warning (Horn)	1	2.6
steering	1	2.6
tyres	1	2.6

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 FLSTFB FATBOY SP 1584 11 beats 0 of its 4 closest rivals (HARLEY-DAVIDSON FLSTF, HARLEY-DAVIDSON FLSTC, HARLEY-DAVIDSON XL1200C).

HARLEY-DAVIDSON FLSTF 88.9% pass · 30.1k tests HARLEY-DAVIDSON FLSTC 89.4% pass · 23.7k tests HARLEY-DAVIDSON XL1200C 88.4% pass · 15.7k 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 FLSTFB FATBOY SP 1584 11.

Pass rate by registration year

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

Best year to buy used: 2010 (92.0% pass). Weakest: 2011 (86.1%).

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.