SUZUKI GZ125

124cc Petrol Class 1

#4958 of 5426 overall #664 of 680 SUZUKIs #495 of 734 commuter bikes

66.1%

first-time pass rate

23.5%

failed outright

11,242

median miles at test

28.5k

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2025

The GZ125's first-time pass rate has fallen 3.6 points since 2005, 71.0% to 67.4%.

Pass rate by mileage

how the GZ125's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage GZ125 passes first time 74.1% of the time; by 50k that's 57.7%.

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 GZ125

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
brakes	4,806	26.3	2.8×
lighting and signalling	4,081	22.4	2.4×
steering and suspension	2,602	14.3	2.2×
drive system	2,326	12.7	7.7×
lamps and reflectors	1,311	7.2	1.8×
tyres and wheels	1,268	6.9	1.9×
structure and attachments	764	4.2	2.8×
suspension	555	3	2.1×
tyres	276	1.5	1.2×
fuel and exhaust	259	1.4	1.1×

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 GZ125 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 GZ125.

Pass rate by registration year

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

Best year to buy used: 2011 (73.8% pass). Weakest: 2000 (63.0%).

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 GZ125 FAQ

answers computed from the data above · terms in the glossary

Is the SUZUKI GZ125 reliable?

The SUZUKI GZ125 is less reliable than average for its class: 66.1% of its 28,534 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4958 of 5426 models.

What does a GZ125 fail its MOT on most?

brakes — 26% of all defects recorded against failed GZ125 tests.

What is the best year of GZ125 to buy used?

By first-time pass rate, 2011-registered examples do best (73.8%) and 2000 worst (63.0%). Condition and history still trump the year.

How many miles will a GZ125 last?

The median GZ125 shows 11,242 miles at test, and examples around 50k miles still pass 57.7% of the time — mileage alone rarely kills one.