BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025
86.4%
first-time pass rate
5.5%
failed outright
11,766
median miles at test
345
MOT tests, 2005–2025

Pass rate over time

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

The FLSTSB's first-time pass rate has risen 16.1 points since 2021, 80.6% to 96.7%.

77%88%100%2021: 80.6% pass (31 tests)2022: 94.9% pass (39 tests)2023: 88.9% pass (36 tests)2025: 96.7% pass (30 tests)20212025

Pass rate by mileage

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

A low-mileage FLSTSB passes first time 88.7% of the time; by 20k that's 84.1%.

83%86%90%0k: 88.7% pass (141 tests)10k: 84.0% pass (125 tests)20k: 84.1% pass (44 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 FLSTSB

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lamps and reflectors
12 31.6
reg plates and vin
8 21.1
steering and suspension
5 13.2
lighting and signalling
5 13.2
brakes
3 7.9
fuel and exhaust
2 5.3
structure and attachments
1 2.6
steering
1 2.6
Identification of the vehicle
1 2.6

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 FLSTSB 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 FLSTSB.

Pass rate by registration year

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

Best year to buy used: 2009 (87.5% pass). Weakest: 2010 (78.8%).

77%83%89%2008: 86.7% pass (120 tests)2009: 87.5% pass (128 tests)2010: 78.8% pass (52 tests)200820092010

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.