BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025
88.1%
first-time pass rate
6.2%
failed outright
26,336
median miles at test
1,265
MOT tests, 2005–2025

Pass rate over time

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

The FLHS's first-time pass rate has fallen 7.3 points since 2006, 92.3% to 85.0%.

72%86%100%2006: 92.3% pass (91 tests)2007: 92.6% pass (81 tests)2008: 84.2% pass (76 tests)2009: 92.0% pass (75 tests)2010: 84.6% pass (78 tests)2011: 93.8% pass (81 tests)2012: 87.3% pass (71 tests)2013: 87.1% pass (70 tests)2014: 88.4% pass (69 tests)2015: 90.8% pass (65 tests)2016: 88.7% pass (62 tests)2017: 82.0% pass (61 tests)2018: 76.4% pass (55 tests)2019: 92.3% pass (52 tests)2020: 87.2% pass (39 tests)2021: 87.5% pass (56 tests)2022: 86.7% pass (45 tests)2023: 80.5% pass (41 tests)2024: 95.3% pass (43 tests)2025: 85.0% pass (40 tests)20062025

Pass rate by mileage

how the FLHS's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage FLHS passes first time 88.6% of the time; by 50k that's 85.2%.

84%89%93%0k: 88.6% pass (281 tests)10k: 88.0% pass (184 tests)20k: 88.6% pass (237 tests)30k: 86.6% pass (209 tests)40k: 91.9% pass (149 tests)50k: 85.2% pass (61 tests)0k30k50k

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 FLHS

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
70 38.7 0.7×
lamps and reflectors
33 18.2 0.9×
brakes
29 16 0.4×
tyres and wheels
10 5.5 0.4×
reg plates and vin
9 5 1.1×
steering and suspension
9 5 0.2×
suspension
8 4.4 0.8×
Identification of the vehicle
5 2.8 1.4×
body and structure
4 2.2 0.7×
fuel and exhaust
4 2.2 0.4×

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 FLHS beats 0 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 FLHS.

Pass rate by registration year

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

Best year to buy used: 1992 (93.0% pass). Weakest: 1991 (84.3%).

83%89%95%1981: 86.9% pass (61 tests)1987: 85.5% pass (55 tests)1988: 86.5% pass (52 tests)1989: 89.2% pass (195 tests)1990: 89.0% pass (228 tests)1991: 84.3% pass (229 tests)1992: 93.0% pass (172 tests)1993: 87.3% pass (79 tests)198119901993

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 FLHS FAQ

answers computed from the data above · terms in the glossary

Is the HARLEY-DAVIDSON FLHS reliable?

The HARLEY-DAVIDSON FLHS is more reliable than average for its class: 88.1% of its 1,265 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1575 of 5426 models.

What does a FLHS fail its MOT on most?

lighting and signalling — 39% of all defects recorded against failed FLHS tests.

What is the best year of FLHS to buy used?

By first-time pass rate, 1992-registered examples do best (93.0%) and 1991 worst (84.3%). Condition and history still trump the year.

How many miles will a FLHS last?

The median FLHS shows 26,336 miles at test, and examples around 50k miles still pass 85.2% of the time — mileage alone rarely kills one.