Model report · 2005–2025
YAMAHA YZ426
426cc
Petrol
Class 2
75.4%
first-time pass rate
18.1%
failed outright
822
median miles at test
138
MOT tests, 2005–2025
What fails on a YZ426
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
32 | 30.5 |
| steering and suspension |
|
16 | 15.2 |
| reg plates and vin |
|
15 | 14.3 |
| brakes |
|
14 | 13.3 |
| fuel and exhaust |
|
9 | 8.6 |
| tyres and wheels |
|
8 | 7.6 |
| lamps and reflectors |
|
4 | 3.8 |
| drive system |
|
3 | 2.9 |
| suspension |
|
2 | 1.9 |
| tyres |
|
2 | 1.9 |
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 YZ426 beats 0 of its 4 closest rivals (KAWASAKI ER5, YAMAHA XV535, SUZUKI GS500).
KAWASAKI
ER5
77.4% pass · 53.1k tests
YAMAHA
XV535
82.7% pass · 48.1k tests
SUZUKI
GS500
76.4% pass · 44.9k tests
SUZUKI
AN400
86.2% pass · 27.1k 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 YZ426.
Pass rate by registration year
how each model-year cohort fares · registration year from first use date
Best year to buy used: 2002 (71.9% pass). Weakest: 2002 (71.9%).
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.