Kawasaki Z400 Reliability, MOT Pass Rate & Common Faults
Free Kawasaki Z400 car check
Is the Kawasaki Z400 reliable? We analysed 888 real MOT tests across 173 vehicles to find out.
Got a specific Kawasaki Z400? Enter the reg for a free check:
The Kawasaki Z400 is above average for reliability based on real UK MOT data. Common problems include roller brake test indicates a binding brake, shock absorber seal failed and leaking oil and drive chain excessively loose. Here's everything you need to know before buying a used Kawasaki Z400.
Kawasaki Z400 Number Plates
Number plates registered to a Kawasaki Z400. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Kawasaki Z400 MOT Pass Rate by Year
How likely is a Kawasaki Z400 to pass its MOT? Here's the pass rate for each registration year, newest first.
Kawasaki Z400 Problems — What Goes Wrong?
The most common reasons a Kawasaki Z400 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Kawasaki Z400 Mileage — What's Normal?
How many miles does a typical Kawasaki Z400 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Kawasaki Z400 MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Kawasaki Z400 year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 1981 | 76 | 84.2% | 14,319 | 24,936 | 43,972 |
| 1980 | 274 | 84.7% | 15,332 | 28,249 | 37,543 |
| 1979 | 147 | 84.4% | 17,553 | 23,324 | 30,931 |
| 1978 | 86 | 77.9% | 16,731 | 25,724 | 30,940 |
| 1977 | 55 | 74.5% | 18,758 | 28,896 | 45,264 |
| 1976 | 107 | 87.9% | 19,951 | 30,084 | 40,534 |
How Long Does a Kawasaki Z400 Last?
Based on 173 Kawasaki Z400 vehicles on UK roads.
Kawasaki Z400 Mileage Distribution
Total mileage recorded across all Kawasaki Z400 MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Kawasaki Z400
Based on MOT pass rates across all registration years with sufficient test data.
87.9% MOT pass rate from 107 tests
74.5% MOT pass rate from 55 tests
The best year to buy a used Kawasaki Z400 is 1976, which has the highest MOT pass rate at 87.9% across 107 tests. The 1977 model year has the lowest pass rate at 74.5% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Kawasaki Z400 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Kawasaki Z400 THIS CAR | 83.1% | 888 | 26,443 mi | 50 yrs |
| Kawasaki ZX-6R | 81.7% | 204,826 | 19,965 mi | 31 yrs |
| Kawasaki ZX-9R | 83.7% | 103,150 | 22,736 mi | 32 yrs |
| Kawasaki ER5 | 81.2% | 65,763 | 22,023 mi | 30 yrs |
| Moto Guzzi V9 Bobber | 89.6% | 929 | 4,127 mi | 10 yrs |
Compared to the Kawasaki ZX-6R (81.7% pass rate) and the Kawasaki ZX-9R (83.7% pass rate), the Kawasaki Z400 sits in the middle of the pack on MOT reliability.
Found a Kawasaki Z400 you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Kawasaki Z400Should you buy a used Kawasaki Z400?
The Kawasaki Z400 has an overall MOT pass rate of 83.1% across 888 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Kawasaki Z400 are roller brake test indicates a binding brake (10 recorded failures), shock absorber seal failed and leaking oil (8), and drive chain excessively loose (7). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical Kawasaki Z400 owner drives around 315 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Kawasaki Z400 models stay on UK roads for around 50 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.