KAWASAKI BN125A6

124cc Petrol Class 1

#4496 of 5426 overall #557 of 592 KAWASAKIs #289 of 734 commuter bikes

73.0%

first-time pass rate

17.7%

failed outright

8,889

median miles at test

671

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2009–2021

The BN125A6's first-time pass rate has fallen 3.3 points since 2009, 76.6% to 73.3%.

Pass rate by mileage

how the BN125A6's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage BN125A6 passes first time 78.8% of the time; by 20k that's 61.8%.

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 BN125A6

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
brakes	92	31.5	2.3×
steering and suspension	40	13.7	1.5×
drive system	38	13	6.0×
lighting and signalling	33	11.3	1.0×
fuel and exhaust	23	7.9	2.7×
suspension	19	6.5	2.4×
tyres and wheels	19	6.5	1.2×
structure and attachments	13	4.5	2.0×
lamps and reflectors	8	2.7	0.7×
tyres	7	2.4	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 BN125A6 beats 3 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 BN125A6.

Pass rate by registration year

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

Best year to buy used: 2005 (83.0% pass). Weakest: 2003 (65.4%).

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.

KAWASAKI BN125A6 FAQ

answers computed from the data above · terms in the glossary

Is the KAWASAKI BN125A6 reliable?

The KAWASAKI BN125A6 is about average for its class: 73.0% of its 671 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4496 of 5426 models.

What does a BN125A6 fail its MOT on most?

brakes — 32% of all defects recorded against failed BN125A6 tests.

What is the best year of BN125A6 to buy used?

By first-time pass rate, 2005-registered examples do best (83.0%) and 2003 worst (65.4%). Condition and history still trump the year.

How many miles will a BN125A6 last?

The median BN125A6 shows 8,889 miles at test, and examples around 20k miles still pass 61.8% of the time — mileage alone rarely kills one.