BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025
88.0%
first-time pass rate
4.4%
failed outright
10,814
median miles at test
251
MOT tests, 2005–2025

Pass rate by mileage

how the GS's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage GS passes first time 91.6% of the time; by 30k that's 84.9%.

84%88%93%0k: 91.6% pass (119 tests)20k: 87.8% pass (49 tests)30k: 84.9% pass (53 tests)0k20k30k

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 GS

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
7 33.3
brakes
6 28.6
steering and suspension
4 19
reg plates and vin
2 9.5
suspension
1 4.8
tyres and wheels
1 4.8

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 GS beats 4 of its 4 closest rivals (PIAGGIO VESPA, HONDA PCX 125, YAMAHA NMAX 125).

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 GS.

Pass rate by registration year

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

Best year to buy used: 1962 (89.9% pass). Weakest: 1964 (83.3%).

82%87%91%1962: 89.9% pass (69 tests)1964: 83.3% pass (54 tests)19621964

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.