Daelim SV vs Yamaha YP250

The Daelim SV passes its MOT first time more often than the Yamaha YP250: 84.1% vs 82.5%, a 1.6-point lead.

MOT reliability, side by side

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

Metric	Daelim SV	Yamaha YP250
First-time pass rate	84.1%	82.5%
Outright fail rate	10.2%	12.3%
Vs comparable bikes (age & mileage adjusted)	+4.6 pts	-2.3 pts
Engine size	247cc	249cc
Rank among all models	#2721 of 5428	#3073 of 5428
Median miles at test	9,167	15,613
MOT tests analysed	283	12,433
Most common failure	brakes	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.

Pass rate by test year

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

Test year	Daelim SV	Yamaha YP250
2017	90.6%	81.6%
2018	85.0%	82.9%
2019	80.0%	84.2%
2020	77.8%	82.5%
2021	83.7%	84.5%
2022	82.4%	81.9%

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

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Daelim SV	Yamaha YP250
0k-10k miles	88.4%	88.6%
10k-20k miles	79.0%	82.5%
20k-30k miles	68.8%	78.6%

Bands with fewer than 30 tests for either bike are left out.

DAELIM SV 84.1% pass · 283 tests YAMAHA YP250 82.5% pass · 12.4k tests

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