KTM 400 Exc (2004)
2004 KTM 400 Exc
CarHunch analysed 162 real MOT records for the 2004 KTM 400 Exc. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2004 KTM 400 EXC falls short of the UK average, with a 71.6% first-time pass rate compared to the national 80%—a meaningful gap that reflects aging two-stroke engineering and the wear typical of off-road bikes. Dangerous defects turn up in just over one in ten vehicles (10.5%), so while not a major red flag, it's worth factoring into your inspection checklist.
These bikes are genuinely well-used: median mileage sits at only 2,908 miles, but that's deceptively low for a 20-year-old machine, suggesting many examples have been stored or used intermittently rather than ridden hard. With an average of 1.52 failures and 3.8 advisories per test, expect routine issues around seals, suspension components, and fuel system wear—nothing catastrophic, but budget for steady maintenance if you're buying one.
What to check before buying a 2004 KTM 400 Exc
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a KTM 400 Exc
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 161 | 71.4% | 1.53 |
| Other (1%) | 1 | 100% | 0 |
Mileage Distribution
Most 2004 KTM 400 Exc vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2004 KTM 400 Exc vehicles fall between 1,583 and 4,231 miles.
2004 KTM 400 Exc — Still on the Road
Numbers are declining — 31 vehicles still getting MOTs in 2025 (41% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
MOT History Averages
Found a specific KTM 400 Exc?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.