BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FAT BOB FXDF 103 1690 13
Model report · 2005–2025

HARLEY-DAVIDSON FAT BOB FXDF 103 1690 13

1690cc Petrol Class 2
89.6%
first-time pass rate
4.7%
failed outright
8,834
median miles at test
1,003
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2016–2025

The FAT BOB FXDF 103 1690 13's first-time pass rate has held steady since 2016 (87.8% → 87.3%).

84%91%97%2016: 87.8% pass (147 tests)2017: 89.7% pass (126 tests)2018: 89.7% pass (97 tests)2019: 88.7% pass (97 tests)2020: 86.6% pass (67 tests)2021: 95.0% pass (100 tests)2022: 92.4% pass (105 tests)2023: 86.2% pass (109 tests)2024: 93.2% pass (74 tests)2025: 87.3% pass (79 tests)20162025

Pass rate by mileage

how the FAT BOB FXDF 103 1690 13's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage FAT BOB FXDF 103 1690 13 passes first time 90.4% of the time; by 20k that's 86.2%.

85%88%91%0k: 90.4% pass (560 tests)10k: 90.5% pass (283 tests)20k: 86.2% pass (116 tests)0k10k20k

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 FAT BOB FXDF 103 1690 13

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lamps and reflectors
34 43 1.5×
brakes
10 12.7 0.2×
structure and attachments
6 7.6 0.9×
suspension
6 7.6 0.7×
lighting and signalling
6 7.6 0.2×
Identification of the vehicle
5 6.3 2.2×
steering
5 6.3 1.0×
reg plates and vin
3 3.8 0.5×
audible warning (Horn)
2 2.5 1.1×
tyres
2 2.5 0.3×

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 FAT BOB FXDF 103 1690 13 beats 4 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 FAT BOB FXDF 103 1690 13.

Pass rate by registration year

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

Best year to buy used: 2013 (89.6% pass). Weakest: 2013 (89.6%).

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 FAT BOB FXDF 103 1690 13 FAQ

answers computed from the data above · terms in the glossary

Is the HARLEY-DAVIDSON FAT BOB FXDF 103 1690 13 reliable?

The HARLEY-DAVIDSON FAT BOB FXDF 103 1690 13 is more reliable than average for its class: 89.6% of its 1,003 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1075 of 5426 models.

What does a FAT BOB FXDF 103 1690 13 fail its MOT on most?

lamps and reflectors — 43% of all defects recorded against failed FAT BOB FXDF 103 1690 13 tests.

How many miles will a FAT BOB FXDF 103 1690 13 last?

The median FAT BOB FXDF 103 1690 13 shows 8,834 miles at test, and examples around 20k miles still pass 86.2% of the time — mileage alone rarely kills one.