BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FLSTFI FATBOY FUEL INJECTED
Model report · 2005–2025

HARLEY-DAVIDSON FLSTFI FATBOY FUEL INJECTED

1450cc Petrol Class 2
89.4%
first-time pass rate
3.2%
failed outright
9,931
median miles at test
1,116
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2025

The FLSTFI FATBOY FUEL INJECTED's first-time pass rate has fallen 2.1 points since 2006, 94.4% to 92.3%.

78%89%100%2006: 94.4% pass (54 tests)2007: 94.8% pass (77 tests)2008: 87.1% pass (93 tests)2009: 94.7% pass (94 tests)2010: 85.3% pass (68 tests)2011: 84.1% pass (63 tests)2012: 85.7% pass (56 tests)2013: 90.0% pass (60 tests)2014: 82.0% pass (50 tests)2015: 86.4% pass (59 tests)2016: 96.3% pass (54 tests)2017: 92.3% pass (52 tests)2018: 90.5% pass (42 tests)2019: 83.3% pass (42 tests)2020: 92.5% pass (40 tests)2021: 90.5% pass (42 tests)2022: 92.0% pass (50 tests)2023: 83.3% pass (42 tests)2024: 87.9% pass (33 tests)2025: 92.3% pass (39 tests)20062025

Pass rate by mileage

how the FLSTFI FATBOY FUEL INJECTED's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage FLSTFI FATBOY FUEL INJECTED passes first time 91.1% of the time; by 30k that's 84.1%.

83%88%93%0k: 91.1% pass (563 tests)10k: 89.3% pass (354 tests)20k: 84.2% pass (114 tests)30k: 84.1% pass (44 tests)0k20k30k

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

failure defects by component group · advisories excluded
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

same type, similar capacity, high test volume

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.

Pass rate by registration year

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

Best year to buy used: 2001 (92.8% pass). Weakest: 2005 (85.0%).

83%89%94%2001: 92.8% pass (125 tests)2002: 89.0% pass (182 tests)2003: 92.1% pass (178 tests)2004: 86.8% pass (273 tests)2005: 85.0% pass (113 tests)2006: 91.2% pass (193 tests)200120042006

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

answers computed from the data above · terms in the glossary

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 #1145 of 5426 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 — mileage alone rarely kills one.