Head-to-head · 2005–2025
Data as of: DVSA MOT results to 2025
Beta RR 4T 450 vs Kawasaki ER5
The Beta RR 4T 450 passes its MOT first time more often than the Kawasaki ER5: 86.6% vs 77.4%, a 9.2-point lead.
MOT reliability, side by side
first-time pass rate, outright fail rate and tests analysed · 2005–2025
| Metric | Beta RR 4T 450 | Kawasaki ER5 |
|---|---|---|
| First-time pass rate | 86.6% | 77.4% |
| Outright fail rate | 8.9% | 14.2% |
| Vs comparable bikes (age & mileage adjusted) | -2.0 pts | -6.2 pts |
| Engine size | 450cc | 498cc |
| Rank among all models | #2016 of 5428 | #3999 of 5428 |
| Median miles at test | 3,059 | 21,259 |
| MOT tests analysed | 313 | 53,115 |
| 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.
"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.