TRIUMPH BONNEVILLE 865 vs TRIUMPH THUNDERBIRD

The TRIUMPH BONNEVILLE 865 passes its MOT first time more often than the TRIUMPH THUNDERBIRD — 89.2% vs 87.8%, a 1.4-point lead.

MOT reliability, side by side

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

Metric	TRIUMPH BONNEVILLE 865	TRIUMPH THUNDERBIRD
First-time pass rate	89.2%	87.8%
Outright fail rate	4.6%	6.2%
Median miles at test	8,536	13,106
MOT tests analysed	5,589	56,312
Most common failure	brakes	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 BONNEVILLE 865 89.2% pass · 5,589 tests TRIUMPH THUNDERBIRD 87.8% pass · 56.3k tests

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