HARLEY-DAVIDSON FXDF FAT BOB 1584 12

1585cc Petrol Class 2

#1400 of 5426 overall #228 of 397 HARLEY-DAVIDSONs #276 of 465 cruiser bikes

88.6%

first-time pass rate

5.8%

failed outright

10,018

median miles at test

874

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2015–2025

The FXDF FAT BOB 1584 12's first-time pass rate has risen 6.7 points since 2015, 84.6% to 91.3%.

Pass rate by mileage

how the FXDF FAT BOB 1584 12's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage FXDF FAT BOB 1584 12 passes first time 87.8% of the time; by 20k that's 83.7%.

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 FXDF FAT BOB 1584 12

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	25	30.1	0.6×
lamps and reflectors	19	22.9	1.2×
brakes	8	9.6	0.2×
reg plates and vin	7	8.4	1.0×
tyres	6	7.2	0.7×
steering and suspension	4	4.8	0.1×
suspension	4	4.8	0.6×
tyres and wheels	4	4.8	0.2×
steering	3	3.6	0.8×
Identification of the vehicle	3	3.6	1.5×

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 FXDF FAT BOB 1584 12 beats 1 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 FXDF FAT BOB 1584 12.

Pass rate by registration year

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

Best year to buy used: 2011 (89.6% pass). Weakest: 2012 (87.8%).

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.

HARLEY-DAVIDSON FXDF FAT BOB 1584 12 FAQ

answers computed from the data above · terms in the glossary

Is the HARLEY-DAVIDSON FXDF FAT BOB 1584 12 reliable?

The HARLEY-DAVIDSON FXDF FAT BOB 1584 12 is more reliable than average for its class: 88.6% of its 874 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1400 of 5426 models.

What does a FXDF FAT BOB 1584 12 fail its MOT on most?

lighting and signalling — 30% of all defects recorded against failed FXDF FAT BOB 1584 12 tests.

How many miles will a FXDF FAT BOB 1584 12 last?

The median FXDF FAT BOB 1584 12 shows 10,018 miles at test, and examples around 20k miles still pass 83.7% of the time — mileage alone rarely kills one.