BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025

KAWASAKI Z

900cc Petrol Class 2
83.8%
first-time pass rate
8.5%
failed outright
24,564
median miles at test
754
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2018

The Z's first-time pass rate has risen 7.6 points since 2006, 82.7% to 90.3%.

75%84%93%2006: 82.7% pass (52 tests)2007: 87.8% pass (41 tests)2008: 85.0% pass (40 tests)2009: 77.8% pass (45 tests)2010: 82.1% pass (39 tests)2011: 77.8% pass (54 tests)2012: 82.5% pass (57 tests)2013: 80.3% pass (66 tests)2014: 86.8% pass (68 tests)2015: 83.3% pass (66 tests)2016: 88.3% pass (60 tests)2017: 79.5% pass (39 tests)2018: 90.3% pass (31 tests)20062018

Pass rate by mileage

how the Z's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage Z passes first time 85.7% of the time; by 40k that's 88.6%.

76%84%91%0k: 85.7% pass (133 tests)10k: 84.0% pass (181 tests)20k: 78.5% pass (144 tests)30k: 83.1% pass (148 tests)40k: 88.6% pass (70 tests)0k20k40k

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 Z

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
38 26.6 0.8×
brakes
35 24.5 0.9×
steering and suspension
31 21.7 0.9×
lamps and reflectors
9 6.3 0.3×
drive system
8 5.6 1.3×
tyres and wheels
7 4.9 0.4×
fuel and exhaust
6 4.2 0.7×
reg plates and vin
5 3.5 1.2×
body and structure
2 1.4 0.6×
suspension
2 1.4 0.4×

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 Z beats 1 of its 4 closest rivals (BMW R1200, BMW R1150, TRIUMPH SPRINT).

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 Z.

Pass rate by registration year

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

Best year to buy used: 1980 (89.5% pass). Weakest: 1977 (74.5%).

72%82%93%1976: 88.9% pass (81 tests)1977: 74.5% pass (51 tests)1978: 79.7% pass (64 tests)1979: 76.0% pass (50 tests)1980: 89.5% pass (124 tests)197619781980

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 Z FAQ

answers computed from the data above · terms in the glossary

Is the KAWASAKI Z reliable?

The KAWASAKI Z is about average for its class: 83.8% of its 754 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #2792 of 5426 models.

What does a Z fail its MOT on most?

lighting and signalling — 27% of all defects recorded against failed Z tests.

What is the best year of Z to buy used?

By first-time pass rate, 1980-registered examples do best (89.5%) and 1977 worst (74.5%). Condition and history still trump the year.

How many miles will a Z last?

The median Z shows 24,564 miles at test, and examples around 40k miles still pass 88.6% of the time — mileage alone rarely kills one.