BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FLSL SOFTAIL SLIM 1745 18
Model report · 2005–2025

HARLEY-DAVIDSON FLSL SOFTAIL SLIM 1745 18

1745cc Petrol Class 2
91.1%
first-time pass rate
3.8%
failed outright
7,080
median miles at test
292
MOT tests, 2005–2025

Pass rate over time

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

The FLSL SOFTAIL SLIM 1745 18's first-time pass rate has fallen 5.3 points since 2021, 93.7% to 88.4%.

85%92%98%2021: 93.7% pass (63 tests)2022: 87.5% pass (64 tests)2023: 89.7% pass (68 tests)2024: 96.0% pass (50 tests)2025: 88.4% pass (43 tests)20212025

What fails on a FLSL SOFTAIL SLIM 1745 18

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lamps and reflectors
8 53.3
Identification of the vehicle
2 13.3
audible warning (Horn)
1 6.7
brakes
1 6.7
steering
1 6.7
structure and attachments
1 6.7
tyres
1 6.7

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 FLSL SOFTAIL SLIM 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 FLSL SOFTAIL SLIM 1745 18.

Pass rate by registration year

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

Best year to buy used: 2018 (92.5% pass). Weakest: 2017 (87.5%).

87%90%94%2017: 87.5% pass (56 tests)2018: 92.5% pass (212 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.