BMW K75S vs Yamaha FZS600

The BMW K75S passes its MOT first time more often than the Yamaha FZS600: 85.8% vs 82.6%, a 3.2-point lead.

MOT reliability, side by side

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

Metric	BMW K75S	Yamaha FZS600
First-time pass rate	85.8%	82.6%
Outright fail rate	8.3%	10.6%
Vs comparable bikes (age & mileage adjusted)	+5.3 pts	-0.8 pts
Engine size	750cc	599cc
Rank among all models	#2266 of 5428	#3052 of 5428
Median miles at test	47,376	21,612
MOT tests analysed	592	136,558
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.

What fails, side by side

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

Component	BMW K75S	Yamaha FZS600
Brakes	3.9%	4.5%
Lights & signalling	3.5%	3.4%
Steering & suspension	2.7%	2.7%
Tyres & wheels	1.5%	2.9%
Structure & body	0.5%	1.1%
Fuel & exhaust	0%	1.1%
Drive system	0%	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	BMW K75S	Yamaha FZS600
2010	84.2%	82.0%
2011	82.4%	81.1%
2012	84.8%	80.2%
2013	86.5%	81.3%
2014	87.2%	81.2%
2015	88.1%	81.1%
2016	76.5%	82.2%
2017	100.0%	82.0%

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	BMW K75S	Yamaha FZS600
10k-20k miles	87.8%	85.5%
20k-30k miles	92.6%	81.4%
30k-40k miles	87.3%	78.7%
40k-50k miles	85.0%	76.8%
50k-60k miles	85.6%	74.7%

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

BMW K75S vs Yamaha FZS600 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the BMW K75S or the Yamaha FZS600?

The BMW K75S passes its MOT first time more often than the Yamaha FZS600: 85.8% vs 82.6%, a 3.2-point lead. Adjusted for age, mileage and test class, the BMW K75S still comes out ahead: +5.3 points vs comparable bikes for the BMW K75S, -0.8 for the Yamaha FZS600. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the BMW K75S fail its MOT on most?

Brakes: 3.9% of BMW K75S MOT tests failed on it, then lights & signalling (3.5%).

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 BMW K75S or the Yamaha FZS600?

At 50k-60k miles the BMW K75S passes first time more often: 85.6% for the BMW K75S vs 74.7% for the Yamaha FZS600.

BMW K75S 85.8% pass · 592 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.