BAOTIAN BT 49 QT-21 MONZA 50

49cc Petrol Class 1

74.4%

first-time pass rate

16.1%

failed outright

3,864

median miles at test

168

MOT tests, 2005–2025

What fails on a BT 49 QT-21 MONZA 50

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	27	45
steering and suspension	12	20
lamps and reflectors	6	10
brakes	4	6.7
suspension	3	5
tyres and wheels	2	3.3
body and structure	2	3.3
driving controls	2	3.3
reg plates and vin	1	1.7
steering	1	1.7

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 49 QT-21 MONZA 50 beats 4 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 BT 49 QT-21 MONZA 50.

Pass rate by registration year

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

Best year to buy used: 2012 (74.6% pass). Weakest: 2012 (74.6%).

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.