HARLEY-DAVIDSON FLSTF FATBOY 1584 11
Pass rate over time
The FLSTF FATBOY 1584 11's first-time pass rate has risen 4.6 points since 2014, 81.1% to 85.7%.
Pass rate by mileage
A low-mileage FLSTF FATBOY 1584 11 passes first time 89.5% of the time; by 20k that's 92.0%.
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 FLSTF FATBOY 1584 11
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| tyres |
|
9 | 27.3 | 2.3× |
| brakes |
|
7 | 21.2 | 0.3× |
| lamps and reflectors |
|
5 | 15.2 | 0.4× |
| tyres and wheels |
|
4 | 12.1 | 0.3× |
| steering |
|
2 | 6.1 | 0.8× |
| lighting and signalling |
|
2 | 6.1 | 0.1× |
| Identification of the vehicle |
|
1 | 3 | 0.8× |
| steering and suspension |
|
1 | 3 | 0.1× |
| structure and attachments |
|
1 | 3 | 0.3× |
| suspension |
|
1 | 3 | 0.2× |
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
On first-time pass rate the FLSTF FATBOY 1584 11 beats 1 of its 4 closest rivals (HARLEY-DAVIDSON FLSTF, HARLEY-DAVIDSON FLSTC, HARLEY-DAVIDSON XL1200C).
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 FLSTF FATBOY 1584 11.
Pass rate by registration year
Best year to buy used: 2011 (88.8% pass). Weakest: 2010 (87.4%).
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 FLSTF FATBOY 1584 11 FAQ
Is the HARLEY-DAVIDSON FLSTF FATBOY 1584 11 reliable?
The HARLEY-DAVIDSON FLSTF FATBOY 1584 11 is more reliable than average for its class: 88.6% of its 569 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1400 of 5426 models.
What does a FLSTF FATBOY 1584 11 fail its MOT on most?
tyres — 27% of all defects recorded against failed FLSTF FATBOY 1584 11 tests.
How many miles will a FLSTF FATBOY 1584 11 last?
The median FLSTF FATBOY 1584 11 shows 7,978 miles at test, and examples around 20k miles still pass 92.0% of the time — mileage alone rarely kills one.