Model report · 2005–2025
KAWASAKI EX305-B4
305cc
Petrol
Class 2
61.4%
first-time pass rate
28.6%
failed outright
28,482
median miles at test
140
MOT tests, 2005–2025
What fails on a EX305-B4
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| steering and suspension |
|
51 | 41.1 |
| brakes |
|
27 | 21.8 |
| lighting and signalling |
|
18 | 14.5 |
| tyres and wheels |
|
10 | 8.1 |
| fuel and exhaust |
|
7 | 5.6 |
| steering |
|
3 | 2.4 |
| suspension |
|
3 | 2.4 |
| lamps and reflectors |
|
2 | 1.6 |
| drive system |
|
2 | 1.6 |
| body and structure |
|
1 | 0.8 |
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 EX305-B4 beats 0 of its 4 closest rivals (SUZUKI AN400, YAMAHA RD350, YAMAHA YP250).
SUZUKI
AN400
86.2% pass · 27.1k tests
YAMAHA
RD350
86.3% pass · 19.6k tests
YAMAHA
YP250
82.5% pass · 12.4k tests
YAMAHA
WR250F
78.0% pass · 10.5k 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 EX305-B4.
Pass rate by registration year
how each model-year cohort fares · registration year from first use date
Best year to buy used: 1986 (70.3% pass). Weakest: 1987 (58.2%).
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.