Beta Evo vs Yamaha WR250F

The Beta Evo passes its MOT first time more often than the Yamaha WR250F: 90.7% vs 78.0%, a 12.7-point lead.

MOT reliability, side by side

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

Metric	Beta Evo	Yamaha WR250F
First-time pass rate	90.7%	78.0%
Outright fail rate	4.6%	12.8%
Engine size	296cc	249cc
Rank among all models	#748 of 5428	#3913 of 5428
Median miles at test	113	3,018
MOT tests analysed	954	10,465
Most common failure	suspension	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.

What fails, side by side

share of each bike's MOT tests that failed on the component · lower is better

Component	Beta Evo	Yamaha WR250F
Lights & signalling	0.7%	8.2%
Steering & suspension	1.8%	5.1%
Tyres & wheels	1.4%	3.0%
Brakes	0.4%	2.2%
Drive system	0%	0.7%
Structure & body	0.2%	0.5%
Fuel & exhaust	0%	0.4%

A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Beta Evo	Yamaha WR250F
2018	85.7%	79.2%
2019	88.7%	77.2%
2020	92.4%	82.5%
2021	92.6%	80.4%
2022	88.8%	76.2%
2023	92.8%	82.1%
2024	88.1%	80.2%
2025	94.7%	81.6%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Beta Evo vs Yamaha WR250F FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Beta Evo or the Yamaha WR250F?

The Beta Evo passes its MOT first time more often than the Yamaha WR250F: 90.7% vs 78.0%, a 12.7-point lead. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Beta Evo fail its MOT on most?

Steering & suspension: 1.8% of Beta Evo MOT tests failed on it, then tyres & wheels (1.4%).

What does the Yamaha WR250F fail its MOT on most?

Lights & signalling: 8.2% of Yamaha WR250F MOT tests failed on it, then steering & suspension (5.1%).

BETA EVO 90.7% pass · 954 tests YAMAHA WR250F 78.0% pass · 10.5k tests

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