Triumph Rocket Iii vs Harley-Davidson Fxsb

The Harley-Davidson Fxsb passes its MOT first time more often than the Triumph Rocket Iii — 89.3% vs 88.3%, a 1.0-point lead.

MOT reliability, side by side

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

Metric	Triumph Rocket Iii	Harley-Davidson Fxsb
First-time pass rate	88.3%	89.3%
Outright fail rate	6.1%	4.4%
Median miles at test	13,110	6,609
MOT tests analysed	15,488	6,915
Most common failure	brakes	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 III 88.3% pass · 15.5k 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.