HARLEY-DAVIDSON FXSB vs TRIUMPH ROCKET III

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	HARLEY-DAVIDSON FXSB	TRIUMPH ROCKET III
First-time pass rate	89.3%	88.3%
Outright fail rate	4.4%	6.1%
Median miles at test	6,609	13,110
MOT tests analysed	6,915	15,488
Most common failure	lamps and reflectors	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 FXSB 89.3% pass · 6,915 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.