Chituma CTM 125-C vs Yamaha YBR 125

The Yamaha YBR 125 passes its MOT first time more often than the Chituma CTM 125-C: 71.0% vs 59.3%, a 11.7-point lead.

MOT reliability, side by side

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

Metric	Chituma CTM 125-C	Yamaha YBR 125
First-time pass rate	59.3%	71.0%
Outright fail rate	27.8%	17.1%
Vs comparable bikes (age & mileage adjusted)	-15.9 pts	-1.1 pts
Engine size	125cc	124cc
Rank among all models	#5235 of 5428	#4664 of 5428
Median miles at test	4,497	10,652
MOT tests analysed	744	124,897
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	Chituma CTM 125-C	Yamaha YBR 125
Lights & signalling	18.5%	8.5%
Steering & suspension	16.3%	6.5%
Brakes	12.6%	5.9%
Tyres & wheels	7.9%	4.4%
Structure & body	3.8%	3.8%
Drive system	3.5%	2.9%
Fuel & exhaust	2.0%	0.6%

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	Chituma CTM 125-C	Yamaha YBR 125
2008	57.9%	71.1%
2009	59.2%	70.7%
2010	64.1%	71.4%
2011	56.8%	69.1%
2012	46.7%	69.1%
2013	59.6%	69.5%
2014	56.8%	70.0%
2015	66.7%	71.2%

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	Chituma CTM 125-C	Yamaha YBR 125
0k-10k miles	59.4%	76.8%
10k-20k miles	60.9%	67.4%

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

Chituma CTM 125-C vs Yamaha YBR 125 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Chituma CTM 125-C or the Yamaha YBR 125?

The Yamaha YBR 125 passes its MOT first time more often than the Chituma CTM 125-C: 71.0% vs 59.3%, a 11.7-point lead. Adjusted for age, mileage and test class, the Yamaha YBR 125 still comes out ahead: -15.9 points vs comparable bikes for the Chituma CTM 125-C, -1.1 for the Yamaha YBR 125. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Chituma CTM 125-C fail its MOT on most?

Lights & signalling: 18.5% of Chituma CTM 125-C MOT tests failed on it, then steering & suspension (16.3%).

What does the Yamaha YBR 125 fail its MOT on most?

Lights & signalling: 8.5% of Yamaha YBR 125 MOT tests failed on it, then steering & suspension (6.5%).

CHITUMA CTM 125-C 59.3% pass · 744 tests YAMAHA YBR 125 71.0% pass · 125k tests

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