What year Triumph T509 Speed Triple is most reliable?

Based on MOT first-test pass rates, the 1997 Triumph T509 Speed Triple has the highest pass rate at 84.5%, out of 155 vehicles tested.

What are the most common Triumph T509 Speed Triple MOT failures?

The most common Triumph T509 Speed Triple MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

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Triumph T509 Speed Triple — Reliability by Year

272 vehicles · MOT data 1997–1998 · first-test pass rates

This page shows MOT first-test pass rates for each year the Triumph T509 Speed Triple was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

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Best pass rate year

1997

84.5% pass rate · 155 vehicles

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Lowest pass rate year

1998

82.4% pass rate · 117 vehicles

Year	Pass rate	Avg mileage	Vehicles
1998	82.4%	23,879 mi	117
1997	84.5%	22,775 mi	155

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