Data as of: DVSA MOT results to 2025
HARLEY-DAVIDSON FLSTFI FATBOY FUEL INJECTED
The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.
“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.
Pass rate over time
The FLSTFI FATBOY FUEL INJECTED's first-time pass rate has fallen 2.1 points since 2006, 94.4% to 92.3%.
Pass rate by mileage
A low-mileage FLSTFI FATBOY FUEL INJECTED passes first time 91.1% of the time; by 30k that's 84.1%.
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 FLSTFI FATBOY FUEL INJECTED
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| lighting and signalling |
|
19 | 31.7 | 0.3× |
| brakes |
|
11 | 18.3 | 0.2× |
| fuel and exhaust |
|
9 | 15 | 0.8× |
| reg plates and vin |
|
7 | 11.7 | 0.9× |
| lamps and reflectors |
|
5 | 8.3 | 0.2× |
| tyres and wheels |
|
3 | 5 | 0.1× |
| Identification of the vehicle |
|
2 | 3.3 | 0.8× |
| steering and suspension |
|
2 | 3.3 | 0.1× |
| tyres |
|
1 | 1.7 | 0.1× |
| wheels |
|
1 | 1.7 | 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
On first-time pass rate the FLSTFI FATBOY FUEL INJECTED beats 3 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 FLSTFI FATBOY FUEL INJECTED.
Compare with any bike
More HARLEY-DAVIDSON models
Pass rate by registration year
Highest pass rate: 2001 (92.8%). Lowest: 2005 (85.0%). Every Flstfi Fatboy Fuel Injected year compared →
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 FLSTFI FATBOY FUEL INJECTED FAQ
Is the HARLEY-DAVIDSON FLSTFI FATBOY FUEL INJECTED reliable?
The HARLEY-DAVIDSON FLSTFI FATBOY FUEL INJECTED is more reliable than average for its class: 89.4% of its 1,116 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1147 of 5428 models.
What does a FLSTFI FATBOY FUEL INJECTED fail its MOT on most?
lighting and signalling: 32% of all defects recorded against failed FLSTFI FATBOY FUEL INJECTED tests.
What is the best year of FLSTFI FATBOY FUEL INJECTED to buy used?
By first-time pass rate, 2001-registered examples do best (92.8%) and 2005 worst (85.0%). Condition and history still trump the year.
How many miles will a FLSTFI FATBOY FUEL INJECTED last?
The median FLSTFI FATBOY FUEL INJECTED shows 9,931 miles at test, and examples around 30k miles still pass 84.1% of the time, so mileage alone rarely decides the result.
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