Head-to-head · 2005–2025
Triumph Bonneville America 865 vs Harley-Davidson XL
The Triumph Bonneville America 865 passes its MOT first time more often than the Harley-Davidson XL — 88.8% vs 87.9%, a 0.9-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Triumph Bonneville America 865 | Harley-Davidson XL |
|---|---|---|
| First-time pass rate | 88.8% | 87.9% |
| Outright fail rate | 6.2% | 5.3% |
| Median miles at test | 8,669 | 6,108 |
| MOT tests analysed | 5,130 | 18,541 |
| 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.
See each bike's full report — trend, mileage curve, failure breakdown and rivals — on its own page.