Derbi GP1 125 vs Honda CBF125

The Honda CBF125 passes its MOT first time more often than the Derbi GP1 125: 73.3% vs 54.8%, a 18.5-point lead.

MOT reliability, side by side

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

Metric	Derbi GP1 125	Honda CBF125
First-time pass rate	54.8%	73.3%
Outright fail rate	32.7%	16.5%
Vs comparable bikes (age & mileage adjusted)	-16.2 pts	+1.1 pts
Engine size	124cc	125cc
Median miles at test	9,722	10,974
MOT tests analysed	104	84,425
Most common failure	brakes	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	Derbi GP1 125	Honda CBF125
0k-10k miles	48.1%	80.3%
10k-20k miles	59.6%	68.7%

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

DERBI GP1 125 54.8% pass · 104 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.