BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HARLEY-DAVIDSON/FLS SOFTAIL SLIM 1690 17
Model report · 2005–2025

HARLEY-DAVIDSON FLS SOFTAIL SLIM 1690 17

1690cc Petrol Class 2
94.6%
first-time pass rate
2.8%
failed outright
5,210
median miles at test
352
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2020–2025

The FLS SOFTAIL SLIM 1690 17's first-time pass rate has risen 11.1 points since 2020, 88.9% to 100.0%.

86%93%100%2020: 88.9% pass (54 tests)2021: 94.5% pass (73 tests)2022: 93.8% pass (65 tests)2023: 96.6% pass (58 tests)2024: 93.9% pass (49 tests)2025: 100.0% pass (51 tests)20202025

What fails on a FLS SOFTAIL SLIM 1690 17

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lamps and reflectors
5 31.2
brakes
4 25
Identification of the vehicle
3 18.8
structure and attachments
2 12.5
tyres
2 12.5

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 FLS SOFTAIL SLIM 1690 17 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 FLS SOFTAIL SLIM 1690 17.

Pass rate by registration year

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

Best year to buy used: 2017 (95.6% pass). Weakest: 2018 (92.9%).

92%94%96%2017: 95.6% pass (227 tests)2018: 92.9% pass (84 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.