Should I check the MOT history before buying a 1998 Triumph T509 Speed Triple?

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 1998 Triumph T509 Speed Triple?

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 1998 Triumph T509 Speed Triple?

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 1998 Triumph T509 Speed Triple reliable?

Based on MOT data from 117 vehicles, the 1998 Triumph T509 Speed Triple has a first-time MOT pass rate of 82.4%, 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 1998 Triumph T509 Speed Triple?

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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Triumph T509 Speed Triple (1998)

117 real MOT outcomes analysed • 82.4% first-time pass rate

1998 Triumph T509 Speed Triple

CarHunch analysed 117 real MOT records for the 1998 Triumph T509 Speed Triple. 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

This 1998 Speed Triple passes its MOT first time just 63.4% of the time, well below the UK average of 80%, which makes it a genuinely unreliable proposition for a buyer expecting consistency. With 10.3% of vehicles developing dangerous defects, you're looking at a real safety concern—nearly 1 in 10 will develop something that needs urgent attention.

These bikes are running around 23,500 miles on average for their age, which is reasonable, but the real story is the 1.38 average failures and 4.1 advisories per vehicle, suggesting this model suffers from persistent wear-related issues rather than catastrophic flaws. Before committing to one, get an independent pre-purchase inspection focused on the ignition system, fuel delivery, and brake components—the advisories point to these as chronic weak spots.

We have limited data for the 1998 Triumph T509 Speed Triple — 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

82.4%

UK average ~80%

Around average

Dangerous (ever)

10.3%

At least once in MOT history

Check this vehicle

Avg failures / car

1.38

Over 8.3 tests on record

High

Typical mileage

24k

Middle half: 17k–33k

For context

These stats describe 117 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 117 Triumph T509 Speed Triple cars.

Before you buy a 1998 Triumph T509 Speed Triple

Based on MOT data from 117 vehicles — here's what to check.

📋 Check the full MOT history. 10.3% 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 (97%)	114	82.4%	1.4

Mileage Distribution

Most 1998 Triumph T509 Speed Triple 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.

23,539

typical

16,674

low mileage

32,922

high mileage

Half of all 1998 Triumph T509 Speed Triple vehicles fall between 16,674 and 32,922 miles.

Is the mileage you're seeing normal?

✓ Under 16,674 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.

✓ 16,674–32,922 miles — normal for age. This is where most 1998 Triumph T509 Speed Triples sit.

⚠ Over 44,444 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

1998 Triumph T509 Speed Triple — Still on the Road

Numbers are thinning — 47% of 1998 Triumph T509 Speed Triples are still active.

Numbers are declining — 22 vehicles still getting MOTs in 2025 (47% 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

8.3

Avg MOT tests per vehicle

1.38

Avg failures per vehicle

4.1

Avg advisories per vehicle

Other model years — Triumph T509 Speed Triple: All T509 Speed Triple years → Which year to buy? →

1997

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Average reliability — agree?