Head-to-head · 2005–2025
Data as of: DVSA MOT results to 2025
Triumph Bonneville T120 vs Harley-Davidson XLH 883
The Triumph Bonneville T120 passes its MOT first time more often than the Harley-Davidson XLH 883: 92.1% vs 87.4%, a 4.7-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Triumph Bonneville T120 | Harley-Davidson XLH 883 |
|---|---|---|
| First-time pass rate | 92.1% | 87.4% |
| Outright fail rate | 3.0% | 5.9% |
| Median miles at test | 4,316 | 10,350 |
| MOT tests analysed | 724 | 41,267 |
| Most common failure | lamps and reflectors | lighting and signalling |
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.