Head-to-head · 2005–2025
Beta RR 4T 450 vs Yamaha XV535
The Beta RR 4T 450 passes its MOT first time more often than the Yamaha XV535 — 86.6% vs 82.7%, a 3.9-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Beta RR 4T 450 | Yamaha XV535 |
|---|---|---|
| First-time pass rate | 86.6% | 82.7% |
| Outright fail rate | 8.9% | 9.8% |
| Median miles at test | 3,059 | 15,604 |
| MOT tests analysed | 313 | 48,056 |
| Most common failure | lighting and signalling | 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.