GILERA GSM 50

49cc Petrol Class 1

53.9%

first-time pass rate

33.5%

failed outright

9,938

median miles at test

191

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2008

The GSM 50's first-time pass rate has held steady since 2006 (42.0% → 42.4%).

What fails on a GSM 50

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	131	44.4
steering and suspension	58	19.7
brakes	41	13.9
drive system	23	7.8
body and structure	15	5.1
tyres and wheels	10	3.4
reg plates and vin	5	1.7
lamps and reflectors	4	1.4
suspension	4	1.4
fuel and exhaust	4	1.4

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 GSM 50 beats 0 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

PEUGEOT SPEEDFIGHT 65.2% pass · 83.7k tests PIAGGIO ZIP 71.3% pass · 79.0k tests PIAGGIO NRG 65.5% pass · 40.5k tests PEUGEOT VIVACITY 70.4% pass · 29.7k tests

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 GSM 50.

Pass rate by registration year

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

Best year to buy used: 2003 (51.0% pass). Weakest: 2003 (51.0%).

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.