Triumph Rocket vs Harley-Davidson Fxsb

The Triumph Rocket passes its MOT first time more often than the Harley-Davidson Fxsb — 90.7% vs 89.3%, a 1.4-point lead.

MOT reliability, side by side

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

Metric	Triumph Rocket	Harley-Davidson Fxsb
First-time pass rate	90.7%	89.3%
Outright fail rate	4.6%	4.4%
Median miles at test	9,851	6,609
MOT tests analysed	3,444	6,915
Most common failure	lamps and reflectors	lamps and reflectors

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.

TRIUMPH ROCKET 90.7% pass · 3,444 tests HARLEY-DAVIDSON FXSB 89.3% pass · 6,915 tests

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