Should I check the MOT history before buying a 2004 KTM 400 Exc?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2004 KTM 400 Exc?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2004 KTM 400 Exc?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 2004 KTM 400 Exc reliable?

Based on MOT data from 162 vehicles, the 2004 KTM 400 Exc has a first-time MOT pass rate of 83.4%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 2004 KTM 400 Exc?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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KTM 400 Exc (2004)

162 real MOT outcomes analysed • 83.4% first-time pass rate

2004 KTM 400 Exc

CarHunch analysed 162 real MOT records for the 2004 KTM 400 Exc. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Compare Models

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.

We have limited data for the 2004 KTM 400 Exc — treat the figures below as indicative rather than definitive.

⚠️ About 1 in 12 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

83.4%

UK average ~80%

Around average

Dangerous (ever)

10.5%

At least once in MOT history

Check this vehicle

Avg failures / car

1.52

Over 8.5 tests on record

High

Typical mileage

Middle half: 2k–4k

For context

These stats describe 162 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

Average reliability — agree?

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 162 KTM 400 Exc cars.

Before you buy a 2004 KTM 400 Exc

Based on MOT data from 162 vehicles — here's what to check.

📋 Check the full MOT history. 10.5% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (99%)	161	83.3%	1.53

Mileage Distribution

Most 2004 KTM 400 Exc vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

2,908

typical

1,583

low mileage

4,231

high mileage

Half of all 2004 KTM 400 Exc vehicles fall between 1,583 and 4,231 miles.

Is the mileage you're seeing normal?

✓ Under 1,583 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 1,583–4,231 miles — normal for age. This is where most 2004 KTM 400 Excs sit.

⚠ Over 5,711 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2004 KTM 400 Exc — Still on the Road

Numbers are thinning — 41% of 2004 KTM 400 Excs are still active.

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.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

8.5

Avg MOT tests per vehicle

1.52

Avg failures per vehicle

3.8

Avg advisories per vehicle

Other model years — KTM 400 Exc: All 400 Exc years → Which year to buy? →

2005 2006

Or browse all models: KTM →

Compare with another model

See how the 2004 KTM 400 Exc stacks up against a rival.

Average reliability — agree?