CPI SX 50

49cc Petrol Class 1

#5411 of 5426 overall #14 of 14 CPIs #450 of 455 moped bikes

47.2%

first-time pass rate

41.9%

failed outright

4,818

median miles at test

229

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2013–2014

The SX 50's first-time pass rate has fallen 5.1 points since 2013, 56.7% to 51.6%.

What fails on a SX 50

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	152	36
steering and suspension	104	24.6
brakes	66	15.6
drive system	37	8.8
body and structure	16	3.8
structure and attachments	10	2.4
reg plates and vin	10	2.4
tyres and wheels	10	2.4
lamps and reflectors	10	2.4
fuel and exhaust	7	1.7

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 SX 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 SX 50.

Pass rate by registration year

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

Best year to buy used: 2008 (47.0% pass). Weakest: 2007 (42.0%).

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.