Kawasaki Z400j MOT Pass Rate
Overall pass rate across all manufacture years, based on 370 real MOT test results. Failure rate: 24.6%.
Data from official DVSA MOT testing records
Kawasaki Z400j MOT Reliability Overview
The Kawasaki Z400j is a rare vehicle in the UK, with 370 MOT test results recorded in our database spanning 5 manufacture years. It has an overall MOT pass rate of 75.4% and a failure rate of 24.6%, which is well above the UK average of approximately 37%.
Based on this data, the Kawasaki Z400j earns a "Excellent" reliability rating. The average Kawasaki Z400j presents for MOT with approximately 29,056 miles on the clock. Manufacture year matters: 1983 models achieve the highest pass rate at 83.3%, while 1981 models have the lowest at 70.6%. This 12.7 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Kawasaki Z400j is Motorcycle lighting and signalling, affecting 14.9% of all tests. Motorcycle lighting and signalling issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. The second most common issue is Motorcycle brakes at 13.2%. Motorcycle steering and suspension rounds out the top three at 11.1%. Together, these top 3 failure categories account for a significant portion of all MOT failures for this model.
Top failures across all manufacture years combined. Individual year pages may show different top failures.
What Fails Most
Pass Rate by Manufacture Year
* High Fail Rate badge indicates an MOT pass rate below 65% (failure rate above 35%).
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Motorcycle Lighting And Signalling | 18.9% | 70 |
| 2 | Motorcycle Brakes | 15.1% | 56 |
| 3 | Motorcycle Steering And Suspension | 14.6% | 54 |
| 4 | Motorcycle Drive System | 6.2% | 23 |
| 5 | Motorcycle Tyres And Wheels | 4.6% | 17 |
| 6 | Motorcycle Fuel And Exhaust | 3.8% | 14 |
| 7 | Motorcycle Driving Controls | 2.4% | 9 |
| 8 | Motorcycle Body And Structure | 2.2% | 8 |
| 9 | Motorcycle Lamps And Reflectors | 1.9% | 7 |
| 10 | Motorcycle Reg Plates And Vin | 1.6% | 6 |
| 11 | Motorcycle Structure And Attachments | 1.6% | 6 |
| 12 | Motorcycle Steering | 1.4% | 5 |
| 13 | Motorcycle Suspension | 0.8% | 3 |
| 14 | Non-component Advisories | 0.8% | 3 |
| 15 | Motorcycle Sidecar | 0.5% | 2 |
Failures per 10,000 Miles
avg. 29,056 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Motorcycle lighting and signalling | 6.51 | 18.9% | 70 |
| Motorcycle brakes | 5.21 | 15.1% | 56 |
| Motorcycle steering and suspension | 5.02 | 14.6% | 54 |
| Motorcycle drive system | 2.14 | 6.2% | 23 |
| Motorcycle tyres and wheels | 1.58 | 4.6% | 17 |
| Motorcycle fuel and exhaust | 1.30 | 3.8% | 14 |
| Motorcycle driving controls | 0.84 | 2.4% | 9 |
| Motorcycle body and structure | 0.74 | 2.2% | 8 |
| Motorcycle lamps and reflectors | 0.65 | 1.9% | 7 |
| Motorcycle reg plates and vin | 0.56 | 1.6% | 6 |
| Motorcycle structure and attachments | 0.56 | 1.6% | 6 |
| Motorcycle steering | 0.47 | 1.4% | 5 |
| Motorcycle suspension | 0.28 | 0.8% | 3 |
| Non-component advisories | 0.28 | 0.8% | 3 |
| Motorcycle sidecar | 0.19 | 0.5% | 2 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Kawasaki Z400j has 29,056 miles when tested for MOT.
📊 Mileage-Adjusted Failure Rate
How often this car fails MOT relative to how much it's driven — a fairer comparison than raw pass rate.
The Kawasaki Z400j has a mileage-adjusted failure rate of 8.47% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Kawasaki Z400j MOT Data
The Kawasaki Z400j is a rare vehicle in the UK, with 370 MOT test results recorded in our database spanning 5 manufacture years. It has an overall MOT pass rate of 75.4% and a failure rate of 24.6%, which is well above the UK average of approximately 37%.
For Kawasaki Z400j owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on motorcycle lighting and signalling and motorcycle brakes for the best chance of a first-time pass. Use our detailed year-by-year breakdown and failure analysis below to understand how your specific Z400j is likely to perform.
Motorcycle lighting and signalling — 14.9% of failures
Motorcycle lighting and signalling issues account for 14.9% of MOT failures on the Kawasaki Z400j. Motorcycle lighting and signalling issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Motorcycle brakes — 13.2% of failures
Motorcycle brakes issues account for 13.2% of MOT failures on the Kawasaki Z400j. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs: £150–400. Pre-MOT check: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm).
Motorcycle steering and suspension — 11.1% of failures
Motorcycle steering and suspension issues account for 11.1% of MOT failures on the Kawasaki Z400j. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Frequently Asked Questions
What is the MOT pass rate for the Kawasaki Z400j?
Based on 370 MOT tests in our database, the Kawasaki Z400j has an overall pass rate of 75.4% (24.6% fail rate).
What are the most common MOT failures on a Kawasaki Z400j?
The top 3 reasons a Kawasaki Z400j fails its MOT are: 1. Motorcycle lighting and signalling (14.9%), 2. Motorcycle brakes (13.2%), 3. Motorcycle steering and suspension (11.1%). Check these areas before booking your MOT.
Is the Kawasaki Z400j reliable?
With a 24.6% MOT failure rate, the Z400j is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Kawasaki Z400j?
Based on failure data, focus on: Motorcycle lighting and signalling (14.9%); Motorcycle brakes (13.2%); Motorcycle steering and suspension (11.1%). These are the areas most likely to cause a fail. Also check all lights, tyres (minimum 1.6mm tread), and windscreen condition — these are quick wins that apply to all cars.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.