BIKERELIABILITY Reg check
League table/ ADLY/JET 50
Model report · 2005–2025

ADLY JET 50

49cc Petrol Class 1
76.0%
first-time pass rate
14.0%
failed outright
7,963
median miles at test
100
MOT tests, 2005–2025

The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.

What fails on a JET 50

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
brakes
17 37
lighting and signalling
13 28.3
steering and suspension
11 23.9
fuel and exhaust
2 4.3
driving controls
1 2.2
reg plates and vin
1 2.2
tyres and wheels
1 2.2

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 JET 50 beats 4 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

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 JET 50.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the Jet 50

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