GENERIC SIRION

49cc Petrol Class 1

72.3%

first-time pass rate

21.7%

failed outright

5,574

median miles at test

184

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2020–2021

The SIRION's first-time pass rate has fallen 8.1 points since 2020, 80.0% to 71.9%.

What fails on a SIRION

failure defects by component group · advisories excluded

Component group	Defects	% of defects
brakes	42	35.3
lamps and reflectors	27	22.7
structure and attachments	14	11.8
suspension	13	10.9
steering	12	10.1
tyres	7	5.9
tyres and wheels	1	0.8
body and structure	1	0.8
fuel and exhaust	1	0.8
lighting and signalling	1	0.8

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 SIRION beats 4 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 SIRION.

Pass rate by registration year

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

Best year to buy used: 2016 (76.2% pass). Weakest: 2017 (72.9%).

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.