KEEN BAD BOY CX

49cc Petrol Class 1

64.1%

first-time pass rate

25.5%

failed outright

2,488

median miles at test

184

MOT tests, 2005–2025

What fails on a BAD BOY CX

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	70	42.9
steering and suspension	46	28.2
brakes	16	9.8
tyres and wheels	6	3.7
fuel and exhaust	6	3.7
reg plates and vin	6	3.7
body and structure	4	2.5
driving controls	4	2.5
structure and attachments	3	1.8
drive system	2	1.2

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 BAD BOY CX 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 BAD BOY CX.

Pass rate by registration year

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

Best year to buy used: 2005 (66.2% pass). Weakest: 2007 (58.8%).

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.