Derbi GPR 125 09 vs Gilera Runner

The Gilera Runner passes its MOT first time more often than the Derbi GPR 125 09: 70.8% vs 64.6%, a 6.2-point lead.

MOT reliability, side by side

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

Metric	Derbi GPR 125 09	Gilera Runner
First-time pass rate	64.6%	70.8%
Outright fail rate	25.6%	21.5%
Vs comparable bikes (age & mileage adjusted)	-10.2 pts	-0.7 pts
Engine size	124cc	124cc
Rank among all models	#5035 of 5428	#4675 of 5428
Median miles at test	5,991	11,381
MOT tests analysed	582	69,850
Most common failure	brakes	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	Derbi GPR 125 09	Gilera Runner
Lights & signalling	11.9%	12.3%
Steering & suspension	9.8%	10.6%
Brakes	13.1%	7.2%
Tyres & wheels	3.8%	5.1%
Structure & body	5.7%	2.0%
Drive system	4.6%	0.0%
Fuel & exhaust	1.5%	2.6%

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	Derbi GPR 125 09	Gilera Runner
2013	63.6%	69.5%
2014	62.0%	70.6%
2015	61.9%	72.1%
2016	70.7%	73.3%
2017	62.9%	76.1%
2018	56.3%	77.2%
2020	51.5%	75.8%

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	Derbi GPR 125 09	Gilera Runner
0k-10k miles	65.4%	76.2%
10k-20k miles	59.7%	67.5%

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

Derbi GPR 125 09 vs Gilera Runner FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Derbi GPR 125 09 or the Gilera Runner?

The Gilera Runner passes its MOT first time more often than the Derbi GPR 125 09: 70.8% vs 64.6%, a 6.2-point lead. Adjusted for age, mileage and test class, the Gilera Runner still comes out ahead: -10.2 points vs comparable bikes for the Derbi GPR 125 09, -0.7 for the Gilera Runner. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Derbi GPR 125 09 fail its MOT on most?

Brakes: 13.1% of Derbi GPR 125 09 MOT tests failed on it, then lights & signalling (11.9%).

What does the Gilera Runner fail its MOT on most?

Lights & signalling: 12.3% of Gilera Runner MOT tests failed on it, then steering & suspension (10.6%).

DERBI GPR 125 09 64.6% pass · 582 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.