Hyosung RX125 vs Honda CG125

The Honda CG125 passes its MOT first time more often than the Hyosung RX125: 72.2% vs 57.3%, a 14.9-point lead.

MOT reliability, side by side

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

Metric	Hyosung RX125	Honda CG125
First-time pass rate	57.3%	72.2%
Outright fail rate	29.6%	16.8%
Vs comparable bikes (age & mileage adjusted)	-14.6 pts	+0.7 pts
Engine size	125cc	124cc
Rank among all models	#5295 of 5428	#4568 of 5428
Median miles at test	8,956	17,460
MOT tests analysed	922	89,345
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.

What fails, side by side

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

Component	Hyosung RX125	Honda CG125
Lights & signalling	20.0%	10.0%
Steering & suspension	11.2%	7.2%
Brakes	12.7%	5.1%
Drive system	11.3%	2.6%
Tyres & wheels	6.0%	4.6%
Structure & body	4.7%	1.9%
Fuel & exhaust	3.0%	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	Hyosung RX125	Honda CG125
2010	54.5%	71.8%
2011	56.6%	70.6%
2012	50.5%	70.6%
2013	55.4%	69.4%
2014	57.5%	69.3%
2015	54.4%	70.9%
2016	60.5%	71.1%
2017	55.9%	72.7%

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	Hyosung RX125	Honda CG125
0k-10k miles	60.4%	79.3%
10k-20k miles	53.4%	73.0%
20k-30k miles	56.6%	68.3%

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

Hyosung RX125 vs Honda CG125 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Hyosung RX125 or the Honda CG125?

The Honda CG125 passes its MOT first time more often than the Hyosung RX125: 72.2% vs 57.3%, a 14.9-point lead. Adjusted for age, mileage and test class, the Honda CG125 still comes out ahead: -14.6 points vs comparable bikes for the Hyosung RX125, +0.7 for the Honda CG125. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Hyosung RX125 fail its MOT on most?

Lights & signalling: 20.0% of Hyosung RX125 MOT tests failed on it, then brakes (12.7%).

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 Hyosung RX125 or the Honda CG125?

At 20k-30k miles the Honda CG125 passes first time more often: 56.6% for the Hyosung RX125 vs 68.3% for the Honda CG125.

HYOSUNG RX125 57.3% pass · 922 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.