KTM Exc vs Yamaha YP250

The Yamaha YP250 passes its MOT first time more often than the KTM Exc: 82.5% vs 73.7%, a 8.8-point lead.

MOT reliability, side by side

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

Metric	KTM Exc	Yamaha YP250
First-time pass rate	73.7%	82.5%
Outright fail rate	13.9%	12.3%
Vs comparable bikes (age & mileage adjusted)	-11.7 pts	-2.3 pts
Engine size	300cc	249cc
Rank among all models	#4432 of 5428	#3073 of 5428
Median miles at test	2,674	15,613
MOT tests analysed	5,084	12,433
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.

What fails, side by side

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

Component	KTM Exc	Yamaha YP250
Lights & signalling	9.2%	2.5%
Steering & suspension	6.1%	5.0%
Tyres & wheels	4.2%	3.8%
Brakes	2.5%	5.3%
Fuel & exhaust	0.4%	0.8%
Structure & body	0.6%	0.5%
Drive system	0.9%	0.0%

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	KTM Exc	Yamaha YP250
2018	75.1%	82.9%
2019	76.2%	84.2%
2020	78.3%	82.5%
2021	80.3%	84.5%
2022	80.4%	81.9%
2023	82.4%	84.4%
2024	80.5%	84.4%
2025	78.0%	85.9%

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	KTM Exc	Yamaha YP250
0k-10k miles	75.6%	88.6%
10k-20k miles	78.2%	82.5%

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

KTM Exc vs Yamaha YP250 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the KTM Exc or the Yamaha YP250?

The Yamaha YP250 passes its MOT first time more often than the KTM Exc: 82.5% vs 73.7%, a 8.8-point lead. Adjusted for age, mileage and test class, the Yamaha YP250 still comes out ahead: -11.7 points vs comparable bikes for the KTM Exc, -2.3 for the Yamaha YP250. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the KTM Exc fail its MOT on most?

Lights & signalling: 9.2% of KTM Exc MOT tests failed on it, then steering & suspension (6.1%).

What does the Yamaha YP250 fail its MOT on most?

Brakes: 5.3% of Yamaha YP250 MOT tests failed on it, then steering & suspension (5.0%).

KTM EXC 73.7% pass · 5,084 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.