Yamaha DT400 Reliability, MOT Pass Rate & Common Faults
Free Yamaha DT400 car check
Is the Yamaha DT400 reliable? We analysed 324 real MOT tests across 100 vehicles to find out.
Got a specific Yamaha DT400? Enter the reg for a free check:
The Yamaha DT400 is above average for reliability based on real UK MOT data. Common problems include reflector on motorcycle missing, stop lamp affected by the operation of another lamp and stop lamp does not illuminate immediately a brake applies. Here's everything you need to know before buying a used Yamaha DT400.
Yamaha DT400 Number Plates
Number plates registered to a Yamaha DT400. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Yamaha DT400 Problems — What Goes Wrong?
The most common reasons a Yamaha DT400 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Yamaha DT400 Mileage — What's Normal?
How many miles does a typical Yamaha DT400 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
How Long Does a Yamaha DT400 Last?
Based on 100 Yamaha DT400 vehicles on UK roads.
Yamaha DT400 Mileage Distribution
Total mileage recorded across all Yamaha DT400 MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
How Does the Yamaha DT400 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Yamaha DT400 THIS CAR | 84.3% | 324 | 7,384 mi | — yrs |
| Yamaha Yzf R1 | 86.5% | 175,313 | 16,232 mi | 28 yrs |
| Yamaha FZS600 | 85% | 157,659 | 22,466 mi | 28 yrs |
| Yamaha XJR1300 | 88.8% | 107,128 | 16,836 mi | 27 yrs |
| Moto Roma Grandprix 125 | 74.9% | 482 | 8,096 mi | 22 yrs |
Compared to the Yamaha Yzf R1 (86.5% pass rate) and the Yamaha FZS600 (85.0% pass rate), the Yamaha DT400 trails behind on MOT reliability.
Found a Yamaha DT400 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 Yamaha DT400Should you buy a used Yamaha DT400?
The Yamaha DT400 has an overall MOT pass rate of 84.3% across 324 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 Yamaha DT400 are reflector on motorcycle missing (3 recorded failures), stop lamp affected by the operation of another lamp (3), and stop lamp does not illuminate immediately a brake applies (2). 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 Yamaha DT400 owner drives around 120 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.
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.