BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FXFB FAT BOB 1745 18
Model report · 2005–2025

HARLEY-DAVIDSON FXFB FAT BOB 1745 18

1745cc Petrol Class 2
92.0%
first-time pass rate
3.2%
failed outright
6,918
median miles at test
312
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2021–2025

The FXFB FAT BOB 1745 18's first-time pass rate has fallen 1.2 points since 2021, 91.8% to 90.6%.

87%93%99%2021: 91.8% pass (61 tests)2022: 91.3% pass (69 tests)2023: 96.9% pass (64 tests)2024: 89.1% pass (55 tests)2025: 90.6% pass (53 tests)20212025

What fails on a FXFB FAT BOB 1745 18

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lamps and reflectors
7 53.8
brakes
3 23.1
Identification of the vehicle
1 7.7
structure and attachments
1 7.7
suspension
1 7.7

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the FXFB FAT BOB 1745 18 beats 4 of its 4 closest rivals (HARLEY-DAVIDSON FLSTF, HARLEY-DAVIDSON FLSTC, HARLEY-DAVIDSON FXDWG).

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 FXFB FAT BOB 1745 18.

Pass rate by registration year

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

Best year to buy used: 2017 (95.7% pass). Weakest: 2018 (90.4%).

89%93%97%2017: 95.7% pass (70 tests)2018: 90.4% pass (219 tests)20172018

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.