KTM 690 SMC vs Yamaha FZS600

The Yamaha FZS600 passes its MOT first time more often than the KTM 690 SMC: 82.6% vs 82.5%, a 0.1-point lead.

MOT reliability, side by side

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

Metric	KTM 690 SMC	Yamaha FZS600
First-time pass rate	82.5%	82.6%
Outright fail rate	8.5%	10.6%
Vs comparable bikes (age & mileage adjusted)	-5.3 pts	-0.8 pts
Engine size	654cc	599cc
Rank among all models	#3073 of 5428	#3052 of 5428
Median miles at test	7,235	21,612
MOT tests analysed	1,254	136,558
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 690 SMC	Yamaha FZS600
Lights & signalling	5.6%	3.4%
Brakes	1.0%	4.5%
Tyres & wheels	2.0%	2.9%
Steering & suspension	1.8%	2.7%
Structure & body	0.9%	1.1%
Fuel & exhaust	0.4%	1.1%
Drive system	0.2%	0.9%

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 690 SMC	Yamaha FZS600
2018	75.3%	81.3%
2019	84.5%	83.0%
2020	87.5%	83.6%
2021	81.9%	82.8%
2022	83.8%	83.6%
2023	79.2%	84.2%
2024	72.0%	83.3%
2025	87.3%	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 690 SMC	Yamaha FZS600
0k-10k miles	83.8%	89.6%
10k-20k miles	82.0%	85.5%
20k-30k miles	63.8%	81.4%

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

KTM 690 SMC vs Yamaha FZS600 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the KTM 690 SMC or the Yamaha FZS600?

The Yamaha FZS600 passes its MOT first time more often than the KTM 690 SMC: 82.6% vs 82.5%, a 0.1-point lead. Adjusted for age, mileage and test class, the Yamaha FZS600 still comes out ahead: -5.3 points vs comparable bikes for the KTM 690 SMC, -0.8 for the Yamaha FZS600. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the KTM 690 SMC fail its MOT on most?

Lights & signalling: 5.6% of KTM 690 SMC MOT tests failed on it, then tyres & wheels (2.0%).

What does the Yamaha FZS600 fail its MOT on most?

Brakes: 4.5% of Yamaha FZS600 MOT tests failed on it, then lights & signalling (3.4%).

Which holds up better at high mileage, the KTM 690 SMC or the Yamaha FZS600?

At 20k-30k miles the Yamaha FZS600 passes first time more often: 63.8% for the KTM 690 SMC vs 81.4% for the Yamaha FZS600.

KTM 690 SMC 82.5% pass · 1,254 tests YAMAHA FZS600 82.6% pass · 137k tests

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