BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ GILERA/STORM 50
Model report · 2005–2025

GILERA STORM 50

49cc Petrol Class 1
74.8%
first-time pass rate
15.6%
failed outright
9,138
median miles at test
302
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2011–2014

The STORM 50's first-time pass rate has risen 3.0 points since 2011, 75.0% to 78.0%.

58%70%82%2011: 75.0% pass (44 tests)2012: 75.6% pass (41 tests)2013: 61.9% pass (42 tests)2014: 78.0% pass (41 tests)20112014

What fails on a STORM 50

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
63 46.7
brakes
25 18.5
steering and suspension
24 17.8
tyres and wheels
7 5.2
fuel and exhaust
4 3
lamps and reflectors
4 3
reg plates and vin
3 2.2
body and structure
2 1.5
driving controls
2 1.5
suspension
1 0.7

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 STORM 50 beats 4 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

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 STORM 50.

Pass rate by registration year

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

Best year to buy used: 2008 (75.9% pass). Weakest: 2007 (71.1%).

70%74%77%2007: 71.1% pass (76 tests)2008: 75.9% pass (162 tests)20072008

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.