Model report · 2005–2025
CPI FORMULA
49cc
Petrol
Class 1
61.8%
first-time pass rate
27.2%
failed outright
3,144
median miles at test
136
MOT tests, 2005–2025
What fails on a FORMULA
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lamps and reflectors |
|
28 | 25.7 |
| brakes |
|
17 | 15.6 |
| lighting and signalling |
|
17 | 15.6 |
| steering and suspension |
|
14 | 12.8 |
| tyres and wheels |
|
9 | 8.3 |
| tyres |
|
8 | 7.3 |
| structure and attachments |
|
5 | 4.6 |
| audible warning (Horn) |
|
4 | 3.7 |
| steering |
|
4 | 3.7 |
| suspension |
|
3 | 2.8 |
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 FORMULA 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 FORMULA.
Pass rate by registration year
how each model-year cohort fares · registration year from first use date
Best year to buy used: 2014 (70.3% pass). Weakest: 2014 (70.3%).
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.