BIKERELIABILITY Reg check
Model report · 2005–2025

BAOTIAN BT 50

49cc Petrol Class 1
61.3%
first-time pass rate
26.6%
failed outright
4,632
median miles at test
124
MOT tests, 2005–2025
-15.2pp
vs expected · age & mileage

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.

“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.

What fails on a BT 50

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
26 29.2
brakes
18 20.2
lamps and reflectors
14 15.7
steering and suspension
10 11.2
tyres and wheels
10 11.2
suspension
4 4.5
fuel and exhaust
3 3.4
structure and attachments
2 2.2
reg plates and vin
1 1.1
audible warning (Horn)
1 1.1

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 BT 50 beats 0 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 BT 50.

Compare with any bike

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

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