Harley-Davidson Pro Street Breakout 1801 17 vs Triumph Rocket Iii

The Harley-Davidson Pro Street Breakout 1801 17 passes its MOT first time more often than the Triumph Rocket Iii — 94.2% vs 88.3%, a 5.9-point lead.

MOT reliability, side by side

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

Metric	Harley-Davidson Pro Street Breakout 1801 17	Triumph Rocket Iii
First-time pass rate	94.2%	88.3%
Outright fail rate	2.2%	6.1%
Median miles at test	7,109	13,110
MOT tests analysed	675	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 PRO STREET BREAKOUT 1801 17 94.2% pass · 675 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.