DERBI X-RACE 50 SM

49cc Petrol Class 1

#5355 of 5426 overall #17 of 19 DERBIs #419 of 455 moped bikes

53.2%

first-time pass rate

34.6%

failed outright

9,844

median miles at test

327

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2013–2016

The X-RACE 50 SM's first-time pass rate has fallen 22.9 points since 2013, 61.4% to 38.5%.

What fails on a X-RACE 50 SM

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	168	37.9
brakes	80	18.1
steering and suspension	52	11.7
lamps and reflectors	36	8.1
drive system	32	7.2
suspension	20	4.5
structure and attachments	19	4.3
reg plates and vin	19	4.3
tyres and wheels	10	2.3
steering	7	1.6

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 X-RACE 50 SM 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 X-RACE 50 SM.

Pass rate by registration year

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

Best year to buy used: 2010 (57.1% pass). Weakest: 2009 (51.7%).

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.