BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025

BSA 500

500cc Petrol Class 2
#67 of 5426 overall #1 of 62 BSAs #43 of 2787 other bikes
95.1%
first-time pass rate
3.4%
failed outright
11,336
median miles at test
326
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2010

The 500's first-time pass rate has held steady since 2006 (97.4% → 96.7%).

92%96%100%2006: 97.4% pass (38 tests)2007: 100.0% pass (34 tests)2009: 93.3% pass (30 tests)2010: 96.7% pass (30 tests)20062010

Pass rate by mileage

how the 500's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage 500 passes first time 95.8% of the time; by 30k that's 92.0%.

90%95%100%0k: 95.8% pass (143 tests)10k: 100.0% pass (31 tests)30k: 92.0% pass (50 tests)0k10k30k

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 500

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
10 35.7
steering and suspension
7 25
brakes
3 10.7
tyres and wheels
2 7.1
body and structure
2 7.1
reg plates and vin
2 7.1
fuel and exhaust
1 3.6
Items Not Tested
1 3.6

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 500 beats 4 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).

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 500.

Pass rate by registration year

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

Best year to buy used: 1971 (90.2% pass). Weakest: 1971 (90.2%).

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.