SUZUKI GZ 125 K9

124cc Petrol Class 1

#4769 of 5426 overall #649 of 680 SUZUKIs #395 of 734 commuter bikes

69.5%

first-time pass rate

20.3%

failed outright

8,032

median miles at test

846

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2012–2025

The GZ 125 K9's first-time pass rate has risen 7.1 points since 2012, 73.5% to 80.6%.

Pass rate by mileage

how the GZ 125 K9's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage GZ 125 K9 passes first time 75.8% of the time; by 20k that's 68.4%.

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a GZ 125 K9

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	118	24.4	2.1×
brakes	110	22.8	2.0×
lamps and reflectors	59	12.2	2.6×
drive system	52	10.8	5.4×
steering and suspension	46	9.5	1.3×
structure and attachments	36	7.5	4.0×
tyres and wheels	26	5.4	1.4×
suspension	17	3.5	2.1×
steering	10	2.1	1.7×
tyres	9	1.9	1.6×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the GZ 125 K9 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 K9.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2010 (74.0% pass). Weakest: 2008 (64.7%).

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.

SUZUKI GZ 125 K9 FAQ

answers computed from the data above · terms in the glossary

Is the SUZUKI GZ 125 K9 reliable?

The SUZUKI GZ 125 K9 is less reliable than average for its class: 69.5% of its 846 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4769 of 5426 models.

What does a GZ 125 K9 fail its MOT on most?

lighting and signalling — 24% of all defects recorded against failed GZ 125 K9 tests.

What is the best year of GZ 125 K9 to buy used?

By first-time pass rate, 2010-registered examples do best (74.0%) and 2008 worst (64.7%). Condition and history still trump the year.

How many miles will a GZ 125 K9 last?

The median GZ 125 K9 shows 8,032 miles at test, and examples around 20k miles still pass 68.4% of the time — mileage alone rarely kills one.