CF Moto CF vs Yamaha FZS600

The Yamaha FZS600 passes its MOT first time more often than the CF Moto CF: 82.6% vs 82.3%, a 0.3-point lead.

MOT reliability, side by side

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

Metric	CF Moto CF	Yamaha FZS600
First-time pass rate	82.3%	82.6%
Outright fail rate	12.3%	10.6%
Vs comparable bikes (age & mileage adjusted)	-6.3 pts	-0.8 pts
Engine size	649cc	599cc
Rank among all models	#3130 of 5428	#3052 of 5428
Median miles at test	6,289	21,612
MOT tests analysed	553	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	CF Moto CF	Yamaha FZS600
Brakes	5.2%	4.5%
Lights & signalling	4.3%	3.4%
Steering & suspension	4.0%	2.7%
Tyres & wheels	2.4%	2.9%
Structure & body	1.6%	1.1%
Drive system	0.5%	0.9%
Fuel & exhaust	0%	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	CF Moto CF	Yamaha FZS600
2018	76.0%	81.3%
2019	75.0%	83.0%
2020	92.4%	83.6%
2021	88.9%	82.8%
2022	78.7%	83.6%
2023	81.4%	84.2%
2024	85.1%	83.3%
2025	76.3%	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	CF Moto CF	Yamaha FZS600
0k-10k miles	82.8%	89.6%
10k-20k miles	79.5%	85.5%

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

CF Moto CF vs Yamaha FZS600 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the CF Moto CF or the Yamaha FZS600?

The Yamaha FZS600 passes its MOT first time more often than the CF Moto CF: 82.6% vs 82.3%, a 0.3-point lead. Adjusted for age, mileage and test class, the Yamaha FZS600 still comes out ahead: -6.3 points vs comparable bikes for the CF Moto CF, -0.8 for the Yamaha FZS600. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the CF Moto CF fail its MOT on most?

Brakes: 5.2% of CF Moto CF MOT tests failed on it, then lights & signalling (4.3%).

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%).

CF MOTO CF 82.3% pass · 553 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.