Harley-Davidson Fxstsse vs Triumph Rocket Iii

The Harley-Davidson Fxstsse passes its MOT first time more often than the Triumph Rocket Iii: 90.3% vs 88.3%, a 2.0-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	Harley-Davidson Fxstsse	Triumph Rocket Iii
First-time pass rate	90.3%	88.3%
Outright fail rate	4.8%	6.1%
Median miles at test	9,408	13,110
MOT tests analysed	795	15,488
Most common failure	tyres and wheels	brakes

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

HARLEY-DAVIDSON FXSTSSE 90.3% pass · 795 tests TRIUMPH ROCKET III 88.3% pass · 15.5k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.