BIKERELIABILITY Reg check
League table/ DERBI/GPR 125 09
Model report · 2005–2025

DERBI GPR 125 09

124cc Petrol Class 1
#5035 of 5428 overall #8 of 19 DERBIs #528 of 734 commuter bikes
64.6%
first-time pass rate
25.6%
failed outright
5,991
median miles at test
582
MOT tests, 2005–2025
-10.2pp
vs expected · age & mileage

The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.

“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.

Pass rate over time

first-time pass rate by test year · 2013–2020

The GPR 125 09's first-time pass rate has fallen 12.1 points since 2013, 63.6% to 51.5%.

47%61%76%2013: 63.6% pass (44 tests)2014: 62.0% pass (71 tests)2015: 61.9% pass (84 tests)2016: 70.7% pass (92 tests)2017: 62.9% pass (62 tests)2018: 56.3% pass (48 tests)2020: 51.5% pass (33 tests)20132020

What fails on a GPR 125 09

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
brakes
128 29.5 3.1×
lighting and signalling
71 16.4 2.0×
steering and suspension
56 12.9 2.5×
lamps and reflectors
39 9 2.4×
drive system
38 8.8 6.4×
structure and attachments
33 7.6 4.5×
tyres and wheels
21 4.8 1.6×
body and structure
20 4.6 5.4×
suspension
18 4.1 3.3×
fuel and exhaust
10 2.3 2.0×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the GPR 125 09 beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

YAMAHA YBR 125 71.0% pass · 125k tests Compare head-to-head →
HONDA CG125 72.2% pass · 89.3k tests Compare head-to-head →
HONDA CBF125 73.3% pass · 84.4k tests Compare head-to-head →
GILERA RUNNER 70.8% pass · 69.9k tests Compare head-to-head →

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the GPR 125 09.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the GPR 125 09

More DERBI models

other DERBI bikes ranked by MOT pass rate
DERBI SENDA 55.0% pass · 9,050 tests
DERBI GPR50-R 53.4% pass · 1,901 tests
DERBI GPR 50 54.7% pass · 1,847 tests
DERBI ATLANTIS 73.4% pass · 1,505 tests
DERBI PREDATOR 66.3% pass · 1,298 tests
DERBI SENDA SM 51.1% pass · 1,013 tests

See all DERBI models →

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2009 (68.1% pass). Weakest: 2011 (61.2%).

60%65%69%2009: 68.1% pass (166 tests)2010: 65.4% pass (185 tests)2011: 61.2% pass (121 tests)2012: 64.1% pass (78 tests)200920112012

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

DERBI GPR 125 09 FAQ

answers computed from the data above · terms in the glossary

Is the DERBI GPR 125 09 reliable?

The DERBI GPR 125 09 is less reliable than average for its class: 64.6% of its 582 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5035 of 5428 models.

What does a GPR 125 09 fail its MOT on most?

brakes — 29% of all defects recorded against failed GPR 125 09 tests.

What is the best year of GPR 125 09 to buy used?

By first-time pass rate, 2009-registered examples do best (68.1%) and 2011 worst (61.2%). Condition and history still trump the year.

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