Rieju SMX125 vs Honda CBF125

The Honda CBF125 passes its MOT first time more often than the Rieju SMX125: 73.3% vs 58.3%, a 15.0-point lead.

MOT reliability, side by side

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

Metric	Rieju SMX125	Honda CBF125
First-time pass rate	58.3%	73.3%
Outright fail rate	31.2%	16.5%
Vs comparable bikes (age & mileage adjusted)	-14.1 pts	+1.1 pts
Engine size	124cc	125cc
Rank among all models	#5266 of 5428	#4471 of 5428
Median miles at test	8,832	10,974
MOT tests analysed	369	84,425
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.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Rieju SMX125	Honda CBF125
0k-10k miles	61.0%	80.3%
10k-20k miles	55.3%	68.7%
20k-30k miles	53.7%	65.5%

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

RIEJU SMX125 58.3% pass · 369 tests HONDA CBF125 73.3% pass · 84.4k tests

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