Model report · 2005–2025
MZ S51
49cc
Petrol
Class 1
84.3%
first-time pass rate
11.8%
failed outright
2,871
median miles at test
51
MOT tests, 2005–2025
What fails on a S51
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
8 | 61.5 |
| brakes |
|
1 | 7.7 |
| fuel and exhaust |
|
1 | 7.7 |
| lamps and reflectors |
|
1 | 7.7 |
| steering and suspension |
|
1 | 7.7 |
| tyres |
|
1 | 7.7 |
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 S51 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 S51.