Rieju SMX125 vs Gilera Runner

The Gilera Runner passes its MOT first time more often than the Rieju SMX125: 70.8% vs 58.3%, a 12.5-point lead.

MOT reliability, side by side

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

Metric	Rieju SMX125	Gilera Runner
First-time pass rate	58.3%	70.8%
Outright fail rate	31.2%	21.5%
Vs comparable bikes (age & mileage adjusted)	-14.1 pts	-0.7 pts
Engine size	124cc	124cc
Rank among all models	#5266 of 5428	#4675 of 5428
Median miles at test	8,832	11,381
MOT tests analysed	369	69,850
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.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Rieju SMX125	Gilera Runner
2007	56.3%	69.7%
2008	66.7%	67.8%
2009	50.0%	67.1%
2010	61.8%	67.9%
2011	47.4%	67.6%
2012	45.0%	69.5%

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 SMX125	Gilera Runner
0k-10k miles	61.0%	76.2%
10k-20k miles	55.3%	67.5%
20k-30k miles	53.7%	65.4%

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

RIEJU SMX125 58.3% pass · 369 tests GILERA RUNNER 70.8% pass · 69.9k tests

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