Model report · 2005–2025
SUZUKI GZ 125 K4
124cc
Petrol
Class 1
62.8%
first-time pass rate
28.3%
failed outright
10,856
median miles at test
145
MOT tests, 2005–2025
What fails on a GZ 125 K4
failure defects by component group · advisories excluded
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| brakes |
|
29 | 24 |
| lighting and signalling |
|
18 | 14.9 |
| steering and suspension |
|
16 | 13.2 |
| structure and attachments |
|
13 | 10.7 |
| drive system |
|
13 | 10.7 |
| tyres and wheels |
|
10 | 8.3 |
| suspension |
|
10 | 8.3 |
| lamps and reflectors |
|
9 | 7.4 |
| reg plates and vin |
|
2 | 1.7 |
| wheels |
|
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 GZ 125 K4 beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).
YAMAHA
YBR 125
71.0% pass · 125k tests
HONDA
CG125
72.2% pass · 89.3k tests
HONDA
CBF125
73.3% pass · 84.4k tests
GILERA
RUNNER
70.8% pass · 69.9k 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 GZ 125 K4.
Pass rate by registration year
how each model-year cohort fares · registration year from first use date
Best year to buy used: 2004 (61.5% pass). Weakest: 2004 (61.5%).
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.