ADLY THUNDER BIKE

124cc Petrol Class 1

68.8%

first-time pass rate

27.5%

failed outright

3,384

median miles at test

109

MOT tests, 2005–2025

What fails on a THUNDER BIKE

failure defects by component group · advisories excluded

Component group	Defects	% of defects
steering and suspension	35	41.2
brakes	21	24.7
lighting and signalling	17	20
tyres and wheels	4	4.7
fuel and exhaust	3	3.5
driving controls	2	2.4
body and structure	2	2.4
Items Not Tested	1	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 THUNDER BIKE beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

YAMAHA YBR 125 71.0% pass · 125k tests HONDA CG125 72.2% pass · 89.3k tests HONDA CBF125 73.3% pass · 84.4k tests GILERA RUNNER 70.8% pass · 69.9k 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 THUNDER BIKE.

Pass rate by registration year

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

Best year to buy used: 2003 (65.8% pass). Weakest: 2003 (65.8%).

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.