Suzuki SV 650 K6 vs Yamaha FZS600

The Suzuki SV 650 K6 and Yamaha FZS600 have an identical 82.6% first-time MOT pass rate.

MOT reliability, side by side

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

Metric	Suzuki SV 650 K6	Yamaha FZS600
First-time pass rate	82.6%	82.6%
Outright fail rate	9.6%	10.6%
Vs comparable bikes (age & mileage adjusted)	-2.5 pts	-0.8 pts
Engine size	645cc	599cc
Rank among all models	#3052 of 5428	#3052 of 5428
Median miles at test	15,031	21,612
MOT tests analysed	1,238	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	Suzuki SV 650 K6	Yamaha FZS600
Lights & signalling	4.6%	3.4%
Brakes	2.5%	4.5%
Steering & suspension	2.8%	2.7%
Tyres & wheels	2.3%	2.9%
Structure & body	0.8%	1.1%
Drive system	0.7%	0.9%
Fuel & exhaust	0.3%	1.1%

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	Suzuki SV 650 K6	Yamaha FZS600
2018	80.3%	81.3%
2019	72.1%	83.0%
2020	87.8%	83.6%
2021	80.3%	82.8%
2022	84.9%	83.6%
2023	82.4%	84.2%
2024	69.4%	83.3%
2025	87.5%	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	Suzuki SV 650 K6	Yamaha FZS600
0k-10k miles	90.9%	89.6%
10k-20k miles	81.3%	85.5%
20k-30k miles	79.0%	81.4%
30k-40k miles	78.0%	78.7%
40k-50k miles	69.0%	76.8%

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

Suzuki SV 650 K6 vs Yamaha FZS600 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Suzuki SV 650 K6 or the Yamaha FZS600?

The Suzuki SV 650 K6 and Yamaha FZS600 have an identical 82.6% first-time MOT pass rate. Adjusted for age, mileage and test class, the Yamaha FZS600 still comes out ahead: -2.5 points vs comparable bikes for the Suzuki SV 650 K6, -0.8 for the Yamaha FZS600. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Suzuki SV 650 K6 fail its MOT on most?

Lights & signalling: 4.6% of Suzuki SV 650 K6 MOT tests failed on it, then steering & suspension (2.8%).

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 Suzuki SV 650 K6 or the Yamaha FZS600?

At 40k-50k miles the Yamaha FZS600 passes first time more often: 69.0% for the Suzuki SV 650 K6 vs 76.8% for the Yamaha FZS600.

SUZUKI SV 650 K6 82.6% pass · 1,238 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.