KTM 450 vs Yamaha XV535

The Yamaha XV535 passes its MOT first time more often than the KTM 450: 82.7% vs 81.4%, a 1.3-point lead.

MOT reliability, side by side

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

Metric	KTM 450	Yamaha XV535
First-time pass rate	81.4%	82.7%
Outright fail rate	9.4%	9.8%
Vs comparable bikes (age & mileage adjusted)	-8.0 pts	-1.8 pts
Engine size	449cc	535cc
Rank among all models	#3291 of 5428	#3029 of 5428
Median miles at test	2,678	15,604
MOT tests analysed	2,574	48,056
Most common failure	lamps and reflectors	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.

"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 450	Yamaha XV535
Lights & signalling	5.3%	3.8%
Steering & suspension	3.8%	3.5%
Tyres & wheels	2.0%	2.9%
Brakes	1.6%	2.4%
Structure & body	0.9%	0.8%
Fuel & exhaust	0.1%	1.2%
Drive system	0.3%	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 450	Yamaha XV535
2018	76.0%	84.3%
2019	79.0%	84.8%
2020	82.3%	84.6%
2021	83.9%	84.9%
2022	82.3%	83.4%
2023	82.5%	84.5%
2024	86.2%	84.5%
2025	81.2%	84.0%

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 450	Yamaha XV535
0k-10k miles	81.8%	88.7%
10k-20k miles	71.4%	83.3%

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

KTM 450 vs Yamaha XV535 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the KTM 450 or the Yamaha XV535?

The Yamaha XV535 passes its MOT first time more often than the KTM 450: 82.7% vs 81.4%, a 1.3-point lead. Adjusted for age, mileage and test class, the Yamaha XV535 still comes out ahead: -8.0 points vs comparable bikes for the KTM 450, -1.8 for the Yamaha XV535. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the KTM 450 fail its MOT on most?

Lights & signalling: 5.3% of KTM 450 MOT tests failed on it, then steering & suspension (3.8%).

What does the Yamaha XV535 fail its MOT on most?

Lights & signalling: 3.8% of Yamaha XV535 MOT tests failed on it, then steering & suspension (3.5%).

KTM 450 81.4% pass · 2,574 tests YAMAHA XV535 82.7% pass · 48.1k tests

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