Rieju RS vs Honda CG125

The Honda CG125 passes its MOT first time more often than the Rieju RS: 72.2% vs 60.4%, a 11.8-point lead.

MOT reliability, side by side

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

Metric	Rieju RS	Honda CG125
First-time pass rate	60.4%	72.2%
Outright fail rate	31.1%	16.8%
Vs comparable bikes (age & mileage adjusted)	-14.0 pts	+0.7 pts
Engine size	124cc	124cc
Rank among all models	#5201 of 5428	#4568 of 5428
Median miles at test	6,698	17,460
MOT tests analysed	988	89,345
Most common failure	lamps and reflectors	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.

What fails, side by side

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

Component	Rieju RS	Honda CG125
Lights & signalling	17.5%	10.0%
Steering & suspension	18.1%	7.2%
Brakes	15.1%	5.1%
Structure & body	11.0%	1.9%
Tyres & wheels	3.3%	4.6%
Drive system	1.2%	2.6%
Fuel & exhaust	0.3%	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	Rieju RS	Honda CG125
2018	57.4%	72.6%
2019	57.0%	71.8%
2020	73.6%	73.6%
2021	56.4%	73.9%
2022	54.0%	73.5%
2023	65.2%	74.4%
2024	62.5%	73.0%
2025	52.5%	76.4%

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	Rieju RS	Honda CG125
0k-10k miles	61.0%	79.3%
10k-20k miles	58.8%	73.0%
20k-30k miles	60.8%	68.3%

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

Rieju RS vs Honda CG125 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Rieju RS or the Honda CG125?

The Honda CG125 passes its MOT first time more often than the Rieju RS: 72.2% vs 60.4%, a 11.8-point lead. Adjusted for age, mileage and test class, the Honda CG125 still comes out ahead: -14.0 points vs comparable bikes for the Rieju RS, +0.7 for the Honda CG125. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Rieju RS fail its MOT on most?

Steering & suspension: 18.1% of Rieju RS MOT tests failed on it, then lights & signalling (17.5%).

What does the Honda CG125 fail its MOT on most?

Lights & signalling: 10.0% of Honda CG125 MOT tests failed on it, then steering & suspension (7.2%).

Which holds up better at high mileage, the Rieju RS or the Honda CG125?

At 20k-30k miles the Honda CG125 passes first time more often: 60.8% for the Rieju RS vs 68.3% for the Honda CG125.

RIEJU RS 60.4% pass · 988 tests HONDA CG125 72.2% pass · 89.3k tests

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