Triumph Twenty One vs Suzuki AN400

The Triumph Twenty One passes its MOT first time more often than the Suzuki AN400: 92.3% vs 86.2%, a 6.1-point lead.

MOT reliability, side by side

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

Metric	Triumph Twenty One	Suzuki AN400
First-time pass rate	92.3%	86.2%
Outright fail rate	4.3%	9.8%
Median miles at test	16,340	15,861
MOT tests analysed	884	27,056
Most common failure	lighting and signalling	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.

TRIUMPH TWENTY ONE 92.3% pass · 884 tests SUZUKI AN400 86.2% pass · 27.1k tests

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