SUZUKI GZ 125 K5

124cc Petrol Class 1

#5016 of 5426 overall #668 of 680 SUZUKIs #519 of 734 commuter bikes

65.0%

first-time pass rate

22.0%

failed outright

11,066

median miles at test

683

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2008–2018

The GZ 125 K5's first-time pass rate has held steady since 2008 (66.0% → 65.6%).

Pass rate by mileage

how the GZ 125 K5's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage GZ 125 K5 passes first time 71.8% of the time; by 20k that's 55.6%.

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 K5

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
brakes	101	27.5	2.9×
lighting and signalling	86	23.4	2.1×
drive system	54	14.7	6.9×
steering and suspension	46	12.5	1.7×
tyres and wheels	32	8.7	1.7×
lamps and reflectors	18	4.9	1.1×
structure and attachments	11	3	1.5×
body and structure	8	2.2	2.1×
suspension	6	1.6	1.2×
reg plates and vin	5	1.4	1.3×

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 K5 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 K5.

Pass rate by registration year

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

Best year to buy used: 2005 (64.9% pass). Weakest: 2006 (62.8%).

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 K5 FAQ

answers computed from the data above · terms in the glossary

Is the SUZUKI GZ 125 K5 reliable?

The SUZUKI GZ 125 K5 is less reliable than average for its class: 65.0% of its 683 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5016 of 5426 models.

What does a GZ 125 K5 fail its MOT on most?

brakes — 28% of all defects recorded against failed GZ 125 K5 tests.

How many miles will a GZ 125 K5 last?

The median GZ 125 K5 shows 11,066 miles at test, and examples around 20k miles still pass 55.6% of the time — mileage alone rarely kills one.