Model report · 2005–2025
WK BIKES SP
49cc
Petrol
Class 1
59.0%
first-time pass rate
33.7%
failed outright
3,702
median miles at test
83
MOT tests, 2005–2025
What fails on a SP
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| structure and attachments |
|
26 | 25.7 |
| brakes |
|
21 | 20.8 |
| lamps and reflectors |
|
16 | 15.8 |
| lighting and signalling |
|
13 | 12.9 |
| suspension |
|
6 | 5.9 |
| steering and suspension |
|
6 | 5.9 |
| drive system |
|
6 | 5.9 |
| driving controls |
|
3 | 3 |
| steering |
|
3 | 3 |
| wheels |
|
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 SP beats 0 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 SP.
Pass rate by registration year
how each model-year cohort fares · registration year from first use date
Best year to buy used: 2014 (51.9% pass). Weakest: 2014 (51.9%).
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.