Triumph Daytona 675 R vs Yamaha YZF-R6

The Triumph Daytona 675 R passes its MOT first time more often than the Yamaha YZF-R6: 89.9% vs 79.0%, a 10.9-point lead.

MOT reliability, side by side

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

Metric	Triumph Daytona 675 R	Yamaha YZF-R6
First-time pass rate	89.9%	79.0%
Outright fail rate	5.1%	12.4%
Vs comparable bikes (age & mileage adjusted)	+2.2 pts	-5.5 pts
Engine size	675cc	599cc
Rank among all models	#988 of 5428	#3771 of 5428
Median miles at test	8,839	17,023
MOT tests analysed	435	155,350
Most common failure	lighting and signalling	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.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Triumph Daytona 675 R	Yamaha YZF-R6
2014	87.9%	77.2%
2015	87.9%	79.0%
2016	84.8%	79.4%
2017	91.7%	79.4%
2018	94.3%	80.2%
2019	90.6%	79.5%
2021	82.4%	80.7%
2023	97.3%	82.7%

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	Triumph Daytona 675 R	Yamaha YZF-R6
0k-10k miles	88.6%	84.3%
10k-20k miles	91.4%	79.9%

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

TRIUMPH DAYTONA 675 R 89.9% pass · 435 tests YAMAHA YZF-R6 79.0% pass · 155k tests

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